From: Sergey Matveev <stargrave@stargrave.org>
Date: Fri, 14 Jun 2024 12:41:37 +0000 (+0300)
Subject: Do not calculate BASS_ROOT everytime
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=57ccd1c453f793f1d0daacdd2b01db1b7cac5755a42e8d6f11738f62b9de2ede;p=bass.git

Do not calculate BASS_ROOT everytime
---

diff --git a/bin/notify b/bin/notify
index 646a80d..f93a0ce 100755
--- a/bin/notify
+++ b/bin/notify
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/..
 . $BASS_ROOT/lib/rc
 
 subj="$@"
diff --git a/build/bin/cksum b/build/bin/cksum
index 271a842..18e2118 100755
--- a/build/bin/cksum
+++ b/build/bin/cksum
@@ -18,7 +18,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 tmp=$(mktemp)
diff --git a/build/bin/mk-skelenv b/build/bin/mk-skelenv
index 67ffaf9..92d1c99 100755
--- a/build/bin/mk-skelenv
+++ b/build/bin/mk-skelenv
@@ -2,7 +2,7 @@
 # Usage: cd empty/dir ; mk-skelenv
 # Create local/ directory and install "rc-paths" and "stow" skelpkgs.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 mkdir local
diff --git a/build/bin/pkg-inst b/build/bin/pkg-inst
index 8478b53..e7ad944 100755
--- a/build/bin/pkg-inst
+++ b/build/bin/pkg-inst
@@ -4,7 +4,7 @@
 # considered. skelbin is always unpacked first, because it may contain
 # preinst hook. Lock is held during each skelpkg installation.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 [ -d local ] || {
diff --git a/build/bin/pkg-rm b/build/bin/pkg-rm
index ef7de51..4b707c0 100755
--- a/build/bin/pkg-rm
+++ b/build/bin/pkg-rm
@@ -4,7 +4,7 @@
 # un-stow-ing of its files. prerm and postrm hooks are considered.
 # Lock is held during each skelpkg removing.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 [ -d local ] || {
diff --git a/build/distfiles/age-v1.1.1-23-g29b68c2-modcache.do b/build/distfiles/age-v1.1.1-23-g29b68c2-modcache.do
index 0267928..5bf7aff 100644
--- a/build/distfiles/age-v1.1.1-23-g29b68c2-modcache.do
+++ b/build/distfiles/age-v1.1.1-23-g29b68c2-modcache.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 redo-ifchange \
     ${NAME%-modcache}.tar.zst \
diff --git a/build/distfiles/age-v1.1.1-23-g29b68c2.tar.zst.do b/build/distfiles/age-v1.1.1-23-g29b68c2.tar.zst.do
index 478903c..d0bf8c8 100644
--- a/build/distfiles/age-v1.1.1-23-g29b68c2.tar.zst.do
+++ b/build/distfiles/age-v1.1.1-23-g29b68c2.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d age.git ] || git clone --depth 1 --bare https://github.com/FiloSottile/age.git >&2
 cd age.git
diff --git a/build/distfiles/cmake-3.28.3.tar.gz.do b/build/distfiles/cmake-3.28.3.tar.gz.do
index 7f946cd..7aff8c8 100644
--- a/build/distfiles/cmake-3.28.3.tar.gz.do
+++ b/build/distfiles/cmake-3.28.3.tar.gz.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 redo-ifchange cmake-3.28.3-SHA-256.txt
 
diff --git a/build/distfiles/dav1d-1.4.2-8-gda2cc78.tar.zst.do b/build/distfiles/dav1d-1.4.2-8-gda2cc78.tar.zst.do
index 9b9bca3..eeddcc2 100644
--- a/build/distfiles/dav1d-1.4.2-8-gda2cc78.tar.zst.do
+++ b/build/distfiles/dav1d-1.4.2-8-gda2cc78.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d dav1d.git ] || git clone --depth 1 --bare https://code.videolan.org/videolan/dav1d.git >&2
 cd dav1d.git
diff --git a/build/distfiles/default.do b/build/distfiles/default.do
index 01f562a..a5a6194 100644
--- a/build/distfiles/default.do
+++ b/build/distfiles/default.do
@@ -1,6 +1,6 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=default.do . "$BASS_ROOT"/lib/rc
 
 # do not explicitly depend on that file, to omit redownloading
 # of everything in case it changes
-. ./default.rc
+. "$DISTFILES"/default.rc
diff --git a/build/distfiles/dq-20240101.tar.zst.do b/build/distfiles/dq-20240101.tar.zst.do
index 2beb3ab..ec2e0ad 100644
--- a/build/distfiles/dq-20240101.tar.zst.do
+++ b/build/distfiles/dq-20240101.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d dq.git ] || git clone --depth 1 --bare https://github.com/janmojzis/dq.git >&2
 cd dq.git
diff --git a/build/distfiles/gcc-4-compile-with-gcc-5.patch.do b/build/distfiles/gcc-4-compile-with-gcc-5.patch.do
index 5402125..b67c195 100644
--- a/build/distfiles/gcc-4-compile-with-gcc-5.patch.do
+++ b/build/distfiles/gcc-4-compile-with-gcc-5.patch.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d guix.git ] || git clone --depth 1 --bare https://git.savannah.gnu.org/git/guix.git >&2
 p=gnu/packages/patches/gcc-4-compile-with-gcc-5.patch
diff --git a/build/distfiles/girara-0.4.3-7-gf6d0676.tar.zst.do b/build/distfiles/girara-0.4.3-7-gf6d0676.tar.zst.do
index 84cc530..7d249e8 100644
--- a/build/distfiles/girara-0.4.3-7-gf6d0676.tar.zst.do
+++ b/build/distfiles/girara-0.4.3-7-gf6d0676.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d girara.git ] || git clone --depth 1 --bare https://git.pwmt.org/pwmt/girara.git >&2
 cd girara.git
diff --git a/build/distfiles/gogost-v5.14.0-modcache.do b/build/distfiles/gogost-v5.14.0-modcache.do
index c23ca99..8fa9217 100644
--- a/build/distfiles/gogost-v5.14.0-modcache.do
+++ b/build/distfiles/gogost-v5.14.0-modcache.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 cd "$GOMODCACHE"
 mkdir -p cache/download/go.cypherpunks.ru/gogost/v5/@v
diff --git a/build/distfiles/golang.org-x-tools-0.18.0-modcache.do b/build/distfiles/golang.org-x-tools-0.18.0-modcache.do
index 8f5ac65..86624f4 100644
--- a/build/distfiles/golang.org-x-tools-0.18.0-modcache.do
+++ b/build/distfiles/golang.org-x-tools-0.18.0-modcache.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 abs3="$DISTFILES"/$3
 redo-ifchange "$BASS_ROOT"/build/lib/zip-hash/zip-hash
diff --git a/build/distfiles/gosha3-v1.0.0-modcache.do b/build/distfiles/gosha3-v1.0.0-modcache.do
index 042ecf7..4005c03 100644
--- a/build/distfiles/gosha3-v1.0.0-modcache.do
+++ b/build/distfiles/gosha3-v1.0.0-modcache.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 
 redo-ifchange "$BASS_ROOT"/build/lib/zip-hash/zip-hash
diff --git a/build/distfiles/gostls13-debash-1.22.4.tar.zst.do b/build/distfiles/gostls13-debash-1.22.4.tar.zst.do
index 3de0702..0424ce2 100644
--- a/build/distfiles/gostls13-debash-1.22.4.tar.zst.do
+++ b/build/distfiles/gostls13-debash-1.22.4.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d gostls13.git ] || git clone --depth 1 --bare git://git.cypherpunks.ru/gostls13.git >&2
 cd gostls13.git
diff --git a/build/distfiles/iniparser-v4.2.2.tar.zst.do b/build/distfiles/iniparser-v4.2.2.tar.zst.do
index 1559c73..12591c0 100644
--- a/build/distfiles/iniparser-v4.2.2.tar.zst.do
+++ b/build/distfiles/iniparser-v4.2.2.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d iniparser.git ] || git clone --depth 1 --bare https://gitlab.com/iniparser/iniparser.git
 cd iniparser.git
diff --git a/build/distfiles/libavif-v1.0.0-535-g7fbc20c.tar.zst.do b/build/distfiles/libavif-v1.0.0-535-g7fbc20c.tar.zst.do
index 9a06391..825c619 100644
--- a/build/distfiles/libavif-v1.0.0-535-g7fbc20c.tar.zst.do
+++ b/build/distfiles/libavif-v1.0.0-535-g7fbc20c.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d libavif.git ] || git clone --depth 1 --bare https://github.com/AOMediaCodec/libavif.git >&2
 cd libavif.git
diff --git a/build/distfiles/libjxl-v0.10-snapshot-179-gcdb6a667.tar.zst.do b/build/distfiles/libjxl-v0.10-snapshot-179-gcdb6a667.tar.zst.do
index 1b9480e..8e84f08 100644
--- a/build/distfiles/libjxl-v0.10-snapshot-179-gcdb6a667.tar.zst.do
+++ b/build/distfiles/libjxl-v0.10-snapshot-179-gcdb6a667.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d libjxl ] || git clone --depth 1 https://github.com/libjxl/libjxl.git >&2
 cd libjxl
diff --git a/build/distfiles/libtap-0.1.0-44-gb53e4ef.tar.zst.do b/build/distfiles/libtap-0.1.0-44-gb53e4ef.tar.zst.do
index ec60153..5fb0751 100644
--- a/build/distfiles/libtap-0.1.0-44-gb53e4ef.tar.zst.do
+++ b/build/distfiles/libtap-0.1.0-44-gb53e4ef.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d libtap.git ] || git clone --depth 1 --bare https://github.com/zorgnax/libtap.git
 cd libtap.git
diff --git a/build/distfiles/mod_tile-v0.7.0-58-gc3453bc.tar.zst.do b/build/distfiles/mod_tile-v0.7.0-58-gc3453bc.tar.zst.do
index ba435af..2c9b796 100644
--- a/build/distfiles/mod_tile-v0.7.0-58-gc3453bc.tar.zst.do
+++ b/build/distfiles/mod_tile-v0.7.0-58-gc3453bc.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d mod_tile.git ] || git clone --depth 1 --bare https://github.com/openstreetmap/mod_tile.git
 cd mod_tile.git
diff --git a/build/distfiles/mupdf-1.24.0-170-g05063f228.tar.zst.do b/build/distfiles/mupdf-1.24.0-170-g05063f228.tar.zst.do
index 5544eb7..4bc3d86 100644
--- a/build/distfiles/mupdf-1.24.0-170-g05063f228.tar.zst.do
+++ b/build/distfiles/mupdf-1.24.0-170-g05063f228.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d mupdf ] || git clone --depth 1 https://github.com/ArtifexSoftware/mupdf.git >&2
 cd mupdf
diff --git a/build/distfiles/ninja-v1.12.1.tar.zst.do b/build/distfiles/ninja-v1.12.1.tar.zst.do
index d15f527..4050ff1 100644
--- a/build/distfiles/ninja-v1.12.1.tar.zst.do
+++ b/build/distfiles/ninja-v1.12.1.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d ninja.git ] || git clone --depth 1 --bare https://github.com/ninja-build/ninja.git >&2
 cd ninja.git
diff --git a/build/distfiles/nsxiv-v32-11-g420a0a2.tar.zst.do b/build/distfiles/nsxiv-v32-11-g420a0a2.tar.zst.do
index 86e67d0..753bb2c 100644
--- a/build/distfiles/nsxiv-v32-11-g420a0a2.tar.zst.do
+++ b/build/distfiles/nsxiv-v32-11-g420a0a2.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d nsxiv.git ] || git clone --depth 1 --bare https://github.com/nsxiv/nsxiv.git >&2
 cd nsxiv.git
diff --git a/build/distfiles/pack b/build/distfiles/pack
index 8f64dad..08cd529 100755
--- a/build/distfiles/pack
+++ b/build/distfiles/pack
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 cd "$DISTFILES"
 {
diff --git a/build/distfiles/svt-av1-v2.1.0-12-gfcf56491.tar.zst.do b/build/distfiles/svt-av1-v2.1.0-12-gfcf56491.tar.zst.do
index b9d970e..45d91a1 100644
--- a/build/distfiles/svt-av1-v2.1.0-12-gfcf56491.tar.zst.do
+++ b/build/distfiles/svt-av1-v2.1.0-12-gfcf56491.tar.zst.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 [ -d svt-av1.git ] || git clone --depth 1 --bare https://gitlab.com/AOMediaCodec/SVT-AV1.git svt-av1.git >&2
 cd svt-av1.git
diff --git a/build/lib/mk-pkg b/build/lib/mk-pkg
index 16c6814..343977e 100755
--- a/build/lib/mk-pkg
+++ b/build/lib/mk-pkg
@@ -22,7 +22,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 BASS_BIRTHTIME="2024-02-12 14:08:37"
diff --git a/build/lib/pkg-inst b/build/lib/pkg-inst
index 14ddca8..049f4ac 100755
--- a/build/lib/pkg-inst
+++ b/build/lib/pkg-inst
@@ -16,7 +16,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 export PKG="$1"
diff --git a/build/lib/pkg-rm b/build/lib/pkg-rm
index 593a14f..b3f50db 100755
--- a/build/lib/pkg-rm
+++ b/build/lib/pkg-rm
@@ -1,7 +1,7 @@
 #!/bin/sh -e
 # It is intended to be called by build/bin/pkg-rm.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 export PKG="$1"
diff --git a/build/pkg/cp-arch b/build/pkg/cp-arch
index 9f003c5..ce786c9 100755
--- a/build/pkg/cp-arch
+++ b/build/pkg/cp-arch
@@ -4,7 +4,7 @@
 # to $DST/$ARCH. It is intended to copy skelpkgs from build machine to
 # NFS shared directory.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 
 dst="$(realpath -- "$1")"
diff --git a/build/pkg/mk-arch b/build/pkg/mk-arch
index f408d89..d8c70de 100755
--- a/build/pkg/mk-arch
+++ b/build/pkg/mk-arch
@@ -3,7 +3,7 @@
 # Create specified $BASS_ROOT/build/pkg/$ARCH directory and fill it with all
 # skels from $BASS_ROOT/build/skel, by hardlinking them into.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . "$BASS_ROOT"/lib/rc
 [ -z "$1" ] || ARCH="$1"
 mkdir -p "$BASS_ROOT"/build/pkg/$ARCH
diff --git a/build/skel/archivers/lzip-1.24.do b/build/skel/archivers/lzip-1.24.do
index ea404db..f0429aa 100644
--- a/build/skel/archivers/lzip-1.24.do
+++ b/build/skel/archivers/lzip-1.24.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/archivers/zstd.do b/build/skel/archivers/zstd.do
index 284271e..20cd6bc 100644
--- a/build/skel/archivers/zstd.do
+++ b/build/skel/archivers/zstd.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/lame-3.100.do b/build/skel/audio/lame-3.100.do
index 8f8c327..b4f3215 100644
--- a/build/skel/audio/lame-3.100.do
+++ b/build/skel/audio/lame-3.100.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/libopusenc-0.2.1.do b/build/skel/audio/libopusenc-0.2.1.do
index 4f4e038..e25dad8 100644
--- a/build/skel/audio/libopusenc-0.2.1.do
+++ b/build/skel/audio/libopusenc-0.2.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/libsndfile-1.0.31.do b/build/skel/audio/libsndfile-1.0.31.do
index 9d48954..d3b2a90 100644
--- a/build/skel/audio/libsndfile-1.0.31.do
+++ b/build/skel/audio/libsndfile-1.0.31.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/libvorbis-1.3.7.do b/build/skel/audio/libvorbis-1.3.7.do
index 9e83932..00f5983 100644
--- a/build/skel/audio/libvorbis-1.3.7.do
+++ b/build/skel/audio/libvorbis-1.3.7.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/opus-1.5.2.do b/build/skel/audio/opus-1.5.2.do
index ba21152..190b4fe 100644
--- a/build/skel/audio/opus-1.5.2.do
+++ b/build/skel/audio/opus-1.5.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/opus-tools-0.2.do b/build/skel/audio/opus-tools-0.2.do
index 9919276..4c4f8d8 100644
--- a/build/skel/audio/opus-tools-0.2.do
+++ b/build/skel/audio/opus-tools-0.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/opusfile-0.12.do b/build/skel/audio/opusfile-0.12.do
index da50b41..b70fb13 100644
--- a/build/skel/audio/opusfile-0.12.do
+++ b/build/skel/audio/opusfile-0.12.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/sox-14.4.2.do b/build/skel/audio/sox-14.4.2.do
index 6cfc075..bfa6087 100644
--- a/build/skel/audio/sox-14.4.2.do
+++ b/build/skel/audio/sox-14.4.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/vorbis-tools-1.4.2.do b/build/skel/audio/vorbis-tools-1.4.2.do
index 648a5f2..3ed6b85 100644
--- a/build/skel/audio/vorbis-tools-1.4.2.do
+++ b/build/skel/audio/vorbis-tools-1.4.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/audio/wavpack-5.7.0.do b/build/skel/audio/wavpack-5.7.0.do
index 1142770..8226c52 100644
--- a/build/skel/audio/wavpack-5.7.0.do
+++ b/build/skel/audio/wavpack-5.7.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/age-v1.1.1-23-g29b68c2.do b/build/skel/crypto/age-v1.1.1-23-g29b68c2.do
index 9754e53..921985d 100644
--- a/build/skel/crypto/age-v1.1.1-23-g29b68c2.do
+++ b/build/skel/crypto/age-v1.1.1-23-g29b68c2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/b3sum-1.5.0.do b/build/skel/crypto/b3sum-1.5.0.do
index a094b4b..f55e629 100644
--- a/build/skel/crypto/b3sum-1.5.0.do
+++ b/build/skel/crypto/b3sum-1.5.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/gnupg-2.4.5.do b/build/skel/crypto/gnupg-2.4.5.do
index d1b6059..165078f 100644
--- a/build/skel/crypto/gnupg-2.4.5.do
+++ b/build/skel/crypto/gnupg-2.4.5.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/gnutls-3.7.10.do b/build/skel/crypto/gnutls-3.7.10.do
index c67edf1..0f178c1 100644
--- a/build/skel/crypto/gnutls-3.7.10.do
+++ b/build/skel/crypto/gnutls-3.7.10.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/gosha3-v1.0.0.do b/build/skel/crypto/gosha3-v1.0.0.do
index 5f576a6..c78e4da 100644
--- a/build/skel/crypto/gosha3-v1.0.0.do
+++ b/build/skel/crypto/gosha3-v1.0.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/gpgme-1.23.2.do b/build/skel/crypto/gpgme-1.23.2.do
index d337e59..d4e82ed 100644
--- a/build/skel/crypto/gpgme-1.23.2.do
+++ b/build/skel/crypto/gpgme-1.23.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/hashers.do b/build/skel/crypto/hashers.do
index 424e269..ee33d90 100644
--- a/build/skel/crypto/hashers.do
+++ b/build/skel/crypto/hashers.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/libassuan-2.5.7.do b/build/skel/crypto/libassuan-2.5.7.do
index 7fdb0b1..82476ab 100644
--- a/build/skel/crypto/libassuan-2.5.7.do
+++ b/build/skel/crypto/libassuan-2.5.7.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/libgcrypt-1.10.3.do b/build/skel/crypto/libgcrypt-1.10.3.do
index 2c1f306..abc7fe5 100644
--- a/build/skel/crypto/libgcrypt-1.10.3.do
+++ b/build/skel/crypto/libgcrypt-1.10.3.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/libgpg-error-1.49.do b/build/skel/crypto/libgpg-error-1.49.do
index 7fdb0b1..82476ab 100644
--- a/build/skel/crypto/libgpg-error-1.49.do
+++ b/build/skel/crypto/libgpg-error-1.49.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/libksba-1.6.6.do b/build/skel/crypto/libksba-1.6.6.do
index 354b2b1..e43ce6d 100644
--- a/build/skel/crypto/libksba-1.6.6.do
+++ b/build/skel/crypto/libksba-1.6.6.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/nettle-3.9.1.do b/build/skel/crypto/nettle-3.9.1.do
index 734b0e4..84f45d0 100644
--- a/build/skel/crypto/nettle-3.9.1.do
+++ b/build/skel/crypto/nettle-3.9.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/npth-1.7.do b/build/skel/crypto/npth-1.7.do
index b7318c9..f1aeda8 100644
--- a/build/skel/crypto/npth-1.7.do
+++ b/build/skel/crypto/npth-1.7.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/openssl-1.1.1w.do b/build/skel/crypto/openssl-1.1.1w.do
index 7ec8249..00d5008 100644
--- a/build/skel/crypto/openssl-1.1.1w.do
+++ b/build/skel/crypto/openssl-1.1.1w.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/pinentry-1.3.0.do b/build/skel/crypto/pinentry-1.3.0.do
index 0510f06..8c10428 100644
--- a/build/skel/crypto/pinentry-1.3.0.do
+++ b/build/skel/crypto/pinentry-1.3.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/crypto/xxhash-v0.8.2.do b/build/skel/crypto/xxhash-v0.8.2.do
index d8b17be..d571c1e 100644
--- a/build/skel/crypto/xxhash-v0.8.2.do
+++ b/build/skel/crypto/xxhash-v0.8.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/db-service.do b/build/skel/databases/db-service.do
index e65f812..e505496 100644
--- a/build/skel/databases/db-service.do
+++ b/build/skel/databases/db-service.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/postgresql-11.22.do b/build/skel/databases/postgresql-11.22.do
index 10726c4..1003bcb 100644
--- a/build/skel/databases/postgresql-11.22.do
+++ b/build/skel/databases/postgresql-11.22.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/postgresql-11.22_and_postgis-2.5.9.do b/build/skel/databases/postgresql-11.22_and_postgis-2.5.9.do
index 8884514..2602bbb 100644
--- a/build/skel/databases/postgresql-11.22_and_postgis-2.5.9.do
+++ b/build/skel/databases/postgresql-11.22_and_postgis-2.5.9.do
@@ -1,7 +1,7 @@
 # PostGIS loves to install itself directly to PostgreSQL,
 # so that is why this is combined skel
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/recoll-1.37.0.do b/build/skel/databases/recoll-1.37.0.do
index ffe37b4..36ceecd 100644
--- a/build/skel/databases/recoll-1.37.0.do
+++ b/build/skel/databases/recoll-1.37.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/recutils-1.9.do b/build/skel/databases/recutils-1.9.do
index 87544a7..b37cfac 100644
--- a/build/skel/databases/recutils-1.9.do
+++ b/build/skel/databases/recutils-1.9.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/sqlite-3450100.do b/build/skel/databases/sqlite-3450100.do
index 81411a7..37ae01d 100644
--- a/build/skel/databases/sqlite-3450100.do
+++ b/build/skel/databases/sqlite-3450100.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/databases/xapian-core-1.4.25.do b/build/skel/databases/xapian-core-1.4.25.do
index 0c1e2e6..37637d6 100644
--- a/build/skel/databases/xapian-core-1.4.25.do
+++ b/build/skel/databases/xapian-core-1.4.25.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/deskutils/remind-05.00.01.do b/build/skel/deskutils/remind-05.00.01.do
index c2f9449..9217b0c 100644
--- a/build/skel/deskutils/remind-05.00.01.do
+++ b/build/skel/deskutils/remind-05.00.01.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/autotools.do b/build/skel/devel/autotools.do
index 721f325..24ac8c8 100644
--- a/build/skel/devel/autotools.do
+++ b/build/skel/devel/autotools.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/boost_1_74_0.do b/build/skel/devel/boost_1_74_0.do
index eb77ec6..58b4bb5 100644
--- a/build/skel/devel/boost_1_74_0.do
+++ b/build/skel/devel/boost_1_74_0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/cmake-3.28.3.do b/build/skel/devel/cmake-3.28.3.do
index a68d349..caa6aec 100644
--- a/build/skel/devel/cmake-3.28.3.do
+++ b/build/skel/devel/cmake-3.28.3.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/getopt-1.1.6.do b/build/skel/devel/getopt-1.1.6.do
index 4ce0bb8..0e83c69 100644
--- a/build/skel/devel/getopt-1.1.6.do
+++ b/build/skel/devel/getopt-1.1.6.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/git-2.45.2.do b/build/skel/devel/git-2.45.2.do
index 8470f38..65b415b 100644
--- a/build/skel/devel/git-2.45.2.do
+++ b/build/skel/devel/git-2.45.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/git-full-2.45.2.do b/build/skel/devel/git-full-2.45.2.do
index 55fca13..368709d 100644
--- a/build/skel/devel/git-full-2.45.2.do
+++ b/build/skel/devel/git-full-2.45.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/git-minimal-2.45.2.do b/build/skel/devel/git-minimal-2.45.2.do
index 85eaf74..a454a34 100644
--- a/build/skel/devel/git-minimal-2.45.2.do
+++ b/build/skel/devel/git-minimal-2.45.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/gmake-4.4.1.do b/build/skel/devel/gmake-4.4.1.do
index d4b46be..7442356 100644
--- a/build/skel/devel/gmake-4.4.1.do
+++ b/build/skel/devel/gmake-4.4.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/go-stringer-0.18.0.do b/build/skel/devel/go-stringer-0.18.0.do
index b799b7e..903ce81 100644
--- a/build/skel/devel/go-stringer-0.18.0.do
+++ b/build/skel/devel/go-stringer-0.18.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/goredo-2.6.2.do b/build/skel/devel/goredo-2.6.2.do
index fd062c5..20bee0b 100644
--- a/build/skel/devel/goredo-2.6.2.do
+++ b/build/skel/devel/goredo-2.6.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/iniparser-v4.2.2.do b/build/skel/devel/iniparser-v4.2.2.do
index b385218..b041cb5 100644
--- a/build/skel/devel/iniparser-v4.2.2.do
+++ b/build/skel/devel/iniparser-v4.2.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/libedit-20230828-3.1.do b/build/skel/devel/libedit-20230828-3.1.do
index cec9671..5509294 100644
--- a/build/skel/devel/libedit-20230828-3.1.do
+++ b/build/skel/devel/libedit-20230828-3.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/libevent-2.1.12.do b/build/skel/devel/libevent-2.1.12.do
index 9725973..9049381 100644
--- a/build/skel/devel/libevent-2.1.12.do
+++ b/build/skel/devel/libevent-2.1.12.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/libiconv-1.17.do b/build/skel/devel/libiconv-1.17.do
index 03155fb..0b5cc05 100644
--- a/build/skel/devel/libiconv-1.17.do
+++ b/build/skel/devel/libiconv-1.17.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/libtap-0.1.0-44-gb53e4ef.do b/build/skel/devel/libtap-0.1.0-44-gb53e4ef.do
index df14154..69582dd 100644
--- a/build/skel/devel/libtap-0.1.0-44-gb53e4ef.do
+++ b/build/skel/devel/libtap-0.1.0-44-gb53e4ef.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/nasm-2.16.01.do b/build/skel/devel/nasm-2.16.01.do
index 725d0a0..2e2fa5e 100644
--- a/build/skel/devel/nasm-2.16.01.do
+++ b/build/skel/devel/nasm-2.16.01.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/ncurses-6.4.do b/build/skel/devel/ncurses-6.4.do
index e45e296..dc9b5d8 100644
--- a/build/skel/devel/ncurses-6.4.do
+++ b/build/skel/devel/ncurses-6.4.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/ninja-v1.12.1.do b/build/skel/devel/ninja-v1.12.1.do
index cc0a55d..a6f1407 100644
--- a/build/skel/devel/ninja-v1.12.1.do
+++ b/build/skel/devel/ninja-v1.12.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/pcre2-10.44.do b/build/skel/devel/pcre2-10.44.do
index 56e7586..58740c1 100644
--- a/build/skel/devel/pcre2-10.44.do
+++ b/build/skel/devel/pcre2-10.44.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/pkgconf-2.1.1.do b/build/skel/devel/pkgconf-2.1.1.do
index b4cef45..cb8a0c4 100644
--- a/build/skel/devel/pkgconf-2.1.1.do
+++ b/build/skel/devel/pkgconf-2.1.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/devel/sharness-1.2.0.do b/build/skel/devel/sharness-1.2.0.do
index dd2773a..e94cf27 100644
--- a/build/skel/devel/sharness-1.2.0.do
+++ b/build/skel/devel/sharness-1.2.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/dns/dq-20240101.do b/build/skel/dns/dq-20240101.do
index 1bffb34..647453b 100644
--- a/build/skel/dns/dq-20240101.do
+++ b/build/skel/dns/dq-20240101.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/dns/libidn2-2.3.7.do b/build/skel/dns/libidn2-2.3.7.do
index cc6dc9b..ed357c2 100644
--- a/build/skel/dns/libidn2-2.3.7.do
+++ b/build/skel/dns/libidn2-2.3.7.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/cairo-1.16.0.do b/build/skel/graphics/cairo-1.16.0.do
index 6099652..e0aaac4 100644
--- a/build/skel/graphics/cairo-1.16.0.do
+++ b/build/skel/graphics/cairo-1.16.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/djvulibre-3.5.28.do b/build/skel/graphics/djvulibre-3.5.28.do
index c2f9449..9217b0c 100644
--- a/build/skel/graphics/djvulibre-3.5.28.do
+++ b/build/skel/graphics/djvulibre-3.5.28.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/freetype-2.9.1.do b/build/skel/graphics/freetype-2.9.1.do
index eeb67fa..261b8c4 100644
--- a/build/skel/graphics/freetype-2.9.1.do
+++ b/build/skel/graphics/freetype-2.9.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/gdal-2.4.4.do b/build/skel/graphics/gdal-2.4.4.do
index 4c984af..927d12f 100644
--- a/build/skel/graphics/gdal-2.4.4.do
+++ b/build/skel/graphics/gdal-2.4.4.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/geos-3.12.1.do b/build/skel/graphics/geos-3.12.1.do
index bab8cfb..b4e5654 100644
--- a/build/skel/graphics/geos-3.12.1.do
+++ b/build/skel/graphics/geos-3.12.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/ghostscript-10.03.1.do b/build/skel/graphics/ghostscript-10.03.1.do
index 305876f..aed35ba 100644
--- a/build/skel/graphics/ghostscript-10.03.1.do
+++ b/build/skel/graphics/ghostscript-10.03.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/harfbuzz-8.5.0.do b/build/skel/graphics/harfbuzz-8.5.0.do
index 0e0c425..31a57a7 100644
--- a/build/skel/graphics/harfbuzz-8.5.0.do
+++ b/build/skel/graphics/harfbuzz-8.5.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/imlib2-1.12.2.do b/build/skel/graphics/imlib2-1.12.2.do
index 4fc1f67..f184ab1 100644
--- a/build/skel/graphics/imlib2-1.12.2.do
+++ b/build/skel/graphics/imlib2-1.12.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/libavif-v1.0.0-535-g7fbc20c.do b/build/skel/graphics/libavif-v1.0.0-535-g7fbc20c.do
index c0b6f2d..8405f21 100644
--- a/build/skel/graphics/libavif-v1.0.0-535-g7fbc20c.do
+++ b/build/skel/graphics/libavif-v1.0.0-535-g7fbc20c.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/libjpeg-turbo-1.5.2.do b/build/skel/graphics/libjpeg-turbo-1.5.2.do
index 76f9f32..3c57d48 100644
--- a/build/skel/graphics/libjpeg-turbo-1.5.2.do
+++ b/build/skel/graphics/libjpeg-turbo-1.5.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/libjxl-v0.10-snapshot-179-gcdb6a667.do b/build/skel/graphics/libjxl-v0.10-snapshot-179-gcdb6a667.do
index 3c8491e..46ca05a 100644
--- a/build/skel/graphics/libjxl-v0.10-snapshot-179-gcdb6a667.do
+++ b/build/skel/graphics/libjxl-v0.10-snapshot-179-gcdb6a667.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/libpng-1.6.43.do b/build/skel/graphics/libpng-1.6.43.do
index 363bd12..c0a5563 100644
--- a/build/skel/graphics/libpng-1.6.43.do
+++ b/build/skel/graphics/libpng-1.6.43.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/libwebp-1.4.0.do b/build/skel/graphics/libwebp-1.4.0.do
index ddbbb71..726086d 100644
--- a/build/skel/graphics/libwebp-1.4.0.do
+++ b/build/skel/graphics/libwebp-1.4.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/mapnik-v3.1.0.do b/build/skel/graphics/mapnik-v3.1.0.do
index c2efa81..1dc4616 100644
--- a/build/skel/graphics/mapnik-v3.1.0.do
+++ b/build/skel/graphics/mapnik-v3.1.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/mod_tile-v0.7.0-58-gc3453bc.do b/build/skel/graphics/mod_tile-v0.7.0-58-gc3453bc.do
index 4910b3e..1612455 100644
--- a/build/skel/graphics/mod_tile-v0.7.0-58-gc3453bc.do
+++ b/build/skel/graphics/mod_tile-v0.7.0-58-gc3453bc.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/mupdf-1.24.0-170-g05063f228.do b/build/skel/graphics/mupdf-1.24.0-170-g05063f228.do
index 4cc43ae..7b74db2 100644
--- a/build/skel/graphics/mupdf-1.24.0-170-g05063f228.do
+++ b/build/skel/graphics/mupdf-1.24.0-170-g05063f228.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/nsxiv-v32-11-g420a0a2.do b/build/skel/graphics/nsxiv-v32-11-g420a0a2.do
index 25bffa3..2c9dad0 100644
--- a/build/skel/graphics/nsxiv-v32-11-g420a0a2.do
+++ b/build/skel/graphics/nsxiv-v32-11-g420a0a2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/pixman-0.40.0.do b/build/skel/graphics/pixman-0.40.0.do
index 55daf77..7cd8381 100644
--- a/build/skel/graphics/pixman-0.40.0.do
+++ b/build/skel/graphics/pixman-0.40.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/proj-4.9.3.do b/build/skel/graphics/proj-4.9.3.do
index e98321b..0882a51 100644
--- a/build/skel/graphics/proj-4.9.3.do
+++ b/build/skel/graphics/proj-4.9.3.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/graphics/zathura-0.5.2.do b/build/skel/graphics/zathura-0.5.2.do
index f521ec5..2fdf670 100644
--- a/build/skel/graphics/zathura-0.5.2.do
+++ b/build/skel/graphics/zathura-0.5.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/Python-3.10.13.do b/build/skel/lang/Python-3.10.13.do
index ab6230e..7da8f2f 100644
--- a/build/skel/lang/Python-3.10.13.do
+++ b/build/skel/lang/Python-3.10.13.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/Python-3.7.3.do b/build/skel/lang/Python-3.7.3.do
index a5143d8..0421c0c 100644
--- a/build/skel/lang/Python-3.7.3.do
+++ b/build/skel/lang/Python-3.7.3.do
@@ -1,7 +1,7 @@
 # Beware: Python tries to create hard-links on a filesystem, so be sure
 # that they are working (or override TMPDIR to somewhere they work)
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/gcc-4.7.4.do b/build/skel/lang/gcc-4.7.4.do
index 23a69e9..98f6f25 100644
--- a/build/skel/lang/gcc-4.7.4.do
+++ b/build/skel/lang/gcc-4.7.4.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/gcc-8.5.0.do b/build/skel/lang/gcc-8.5.0.do
index ff1c7c8..a3b30e5 100644
--- a/build/skel/lang/gcc-8.5.0.do
+++ b/build/skel/lang/gcc-8.5.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/gm4-1.4.19.do b/build/skel/lang/gm4-1.4.19.do
index 89ce107..8c79df3 100644
--- a/build/skel/lang/gm4-1.4.19.do
+++ b/build/skel/lang/gm4-1.4.19.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/go1.17.13.do b/build/skel/lang/go1.17.13.do
index 98bfe98..902cf97 100644
--- a/build/skel/lang/go1.17.13.do
+++ b/build/skel/lang/go1.17.13.do
@@ -1,6 +1,6 @@
 # FreeBSD may require disabling ASLR (kern.elf64.aslr.enable=0)
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/go1.20.14.do b/build/skel/lang/go1.20.14.do
index 670df22..5ab9528 100644
--- a/build/skel/lang/go1.20.14.do
+++ b/build/skel/lang/go1.20.14.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/go1.22.4.do b/build/skel/lang/go1.22.4.do
index c54f513..133aad0 100644
--- a/build/skel/lang/go1.22.4.do
+++ b/build/skel/lang/go1.22.4.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/go1.4.3.do b/build/skel/lang/go1.4.3.do
index b5f290c..8f434a2 100644
--- a/build/skel/lang/go1.4.3.do
+++ b/build/skel/lang/go1.4.3.do
@@ -19,7 +19,7 @@
 # cd /tmp/fbsd12-chroot/root/go/src
 # ./make.bash --no-clean
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/perl-5.32.1.do b/build/skel/lang/perl-5.32.1.do
index 1c82105..b48d19d 100644
--- a/build/skel/lang/perl-5.32.1.do
+++ b/build/skel/lang/perl-5.32.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/lang/tcl8.6.14.do b/build/skel/lang/tcl8.6.14.do
index 1dd6e94..4698e8e 100644
--- a/build/skel/lang/tcl8.6.14.do
+++ b/build/skel/lang/tcl8.6.14.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/math/gmp-6.3.0.do b/build/skel/math/gmp-6.3.0.do
index ed6d4f7..f92c9d2 100644
--- a/build/skel/math/gmp-6.3.0.do
+++ b/build/skel/math/gmp-6.3.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/math/mpc-1.3.1.do b/build/skel/math/mpc-1.3.1.do
index 9860c31..98294f5 100644
--- a/build/skel/math/mpc-1.3.1.do
+++ b/build/skel/math/mpc-1.3.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/math/mpfr-4.2.1.do b/build/skel/math/mpfr-4.2.1.do
index 375941a..deda564 100644
--- a/build/skel/math/mpfr-4.2.1.do
+++ b/build/skel/math/mpfr-4.2.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/misc/gocheese-4.2.0.do b/build/skel/misc/gocheese-4.2.0.do
index 14dee6f..1ba606a 100644
--- a/build/skel/misc/gocheese-4.2.0.do
+++ b/build/skel/misc/gocheese-4.2.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/misc/supercat-0.5.8.do b/build/skel/misc/supercat-0.5.8.do
index 98d5bcc..64a01b5 100644
--- a/build/skel/misc/supercat-0.5.8.do
+++ b/build/skel/misc/supercat-0.5.8.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/multimedia/dav1d-1.4.2-8-gda2cc78.do b/build/skel/multimedia/dav1d-1.4.2-8-gda2cc78.do
index c254c7d..be099cc 100644
--- a/build/skel/multimedia/dav1d-1.4.2-8-gda2cc78.do
+++ b/build/skel/multimedia/dav1d-1.4.2-8-gda2cc78.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/multimedia/ffmpeg-7.0.1.do b/build/skel/multimedia/ffmpeg-7.0.1.do
index b38f85f..7ea2fa3 100644
--- a/build/skel/multimedia/ffmpeg-7.0.1.do
+++ b/build/skel/multimedia/ffmpeg-7.0.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/multimedia/ffmpeg-doc-7.0.1.do b/build/skel/multimedia/ffmpeg-doc-7.0.1.do
index 12388b0..35c1b1c 100644
--- a/build/skel/multimedia/ffmpeg-doc-7.0.1.do
+++ b/build/skel/multimedia/ffmpeg-doc-7.0.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/multimedia/libogg-1.3.5.do b/build/skel/multimedia/libogg-1.3.5.do
index 1142770..8226c52 100644
--- a/build/skel/multimedia/libogg-1.3.5.do
+++ b/build/skel/multimedia/libogg-1.3.5.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/multimedia/svt-av1-v2.1.0-12-gfcf56491.do b/build/skel/multimedia/svt-av1-v2.1.0-12-gfcf56491.do
index d2bd49c..827e7ec 100644
--- a/build/skel/multimedia/svt-av1-v2.1.0-12-gfcf56491.do
+++ b/build/skel/multimedia/svt-av1-v2.1.0-12-gfcf56491.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/py-some-venv.do b/build/skel/py-some-venv.do
index 04696d1..7bc8571 100644
--- a/build/skel/py-some-venv.do
+++ b/build/skel/py-some-venv.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/rc-paths.do b/build/skel/rc-paths.do
index 0cf83d8..a1bb401 100644
--- a/build/skel/rc-paths.do
+++ b/build/skel/rc-paths.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/shells/bash-5.2.21.do b/build/skel/shells/bash-5.2.21.do
index a5800ab..340c156 100644
--- a/build/skel/shells/bash-5.2.21.do
+++ b/build/skel/shells/bash-5.2.21.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/shells/zsh-5.9.do b/build/skel/shells/zsh-5.9.do
index e72e412..f0ea0e7 100644
--- a/build/skel/shells/zsh-5.9.do
+++ b/build/skel/shells/zsh-5.9.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/slave-base.do b/build/skel/slave-base.do
index 6d11061..9467442 100644
--- a/build/skel/slave-base.do
+++ b/build/skel/slave-base.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/stow.do b/build/skel/stow.do
index 88535a2..5571b9d 100644
--- a/build/skel/stow.do
+++ b/build/skel/stow.do
@@ -2,7 +2,7 @@
 # system itself, because pkg-inst requires stow, that we are going to
 # build. Perl is used from the base OS.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/sysutils/daemontools-encore-1.11.do b/build/skel/sysutils/daemontools-encore-1.11.do
index 2950083..e04d6fb 100644
--- a/build/skel/sysutils/daemontools-encore-1.11.do
+++ b/build/skel/sysutils/daemontools-encore-1.11.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/sysutils/less-643.do b/build/skel/sysutils/less-643.do
index 5a9ea87..423d179 100644
--- a/build/skel/sysutils/less-643.do
+++ b/build/skel/sysutils/less-643.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/sysutils/meta4ra-0.9.0.do b/build/skel/sysutils/meta4ra-0.9.0.do
index f75fae3..dd21e4a 100644
--- a/build/skel/sysutils/meta4ra-0.9.0.do
+++ b/build/skel/sysutils/meta4ra-0.9.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/sysutils/parallel-20240122.do b/build/skel/sysutils/parallel-20240122.do
index b15932e..f971afa 100644
--- a/build/skel/sysutils/parallel-20240122.do
+++ b/build/skel/sysutils/parallel-20240122.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/sysutils/tmux-3.3.do b/build/skel/sysutils/tmux-3.3.do
index db683b9..496fb2d 100644
--- a/build/skel/sysutils/tmux-3.3.do
+++ b/build/skel/sysutils/tmux-3.3.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/sysutils/ucspi-tcp-0.88.do b/build/skel/sysutils/ucspi-tcp-0.88.do
index 05f04d3..06b007c 100644
--- a/build/skel/sysutils/ucspi-tcp-0.88.do
+++ b/build/skel/sysutils/ucspi-tcp-0.88.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/expat-2.6.2.do b/build/skel/textproc/expat-2.6.2.do
index 50cb8dd..6cb7531 100644
--- a/build/skel/textproc/expat-2.6.2.do
+++ b/build/skel/textproc/expat-2.6.2.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/gnu-grep-3.11.do b/build/skel/textproc/gnu-grep-3.11.do
index 9ac0bc4..4d198a9 100644
--- a/build/skel/textproc/gnu-grep-3.11.do
+++ b/build/skel/textproc/gnu-grep-3.11.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/icu4c-63.do b/build/skel/textproc/icu4c-63.do
index 0fe64e7..38df0bc 100644
--- a/build/skel/textproc/icu4c-63.do
+++ b/build/skel/textproc/icu4c-63.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/icu4c-75.do b/build/skel/textproc/icu4c-75.do
index f78a514..59d206a 100644
--- a/build/skel/textproc/icu4c-75.do
+++ b/build/skel/textproc/icu4c-75.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../...
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../...
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/libxml2-2.9.14.do b/build/skel/textproc/libxml2-2.9.14.do
index 83efe2e..6fbcc9c 100644
--- a/build/skel/textproc/libxml2-2.9.14.do
+++ b/build/skel/textproc/libxml2-2.9.14.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/texinfo-7.1.do b/build/skel/textproc/texinfo-7.1.do
index fbb9fa5..67a90f8 100644
--- a/build/skel/textproc/texinfo-7.1.do
+++ b/build/skel/textproc/texinfo-7.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/textproc/xmlto-0.0.26.do b/build/skel/textproc/xmlto-0.0.26.do
index 0d56fce..a600c92 100644
--- a/build/skel/textproc/xmlto-0.0.26.do
+++ b/build/skel/textproc/xmlto-0.0.26.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/angie-1.5.0.do b/build/skel/www/angie-1.5.0.do
index 4ed89b8..05e7684 100644
--- a/build/skel/www/angie-1.5.0.do
+++ b/build/skel/www/angie-1.5.0.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/angie-service.do b/build/skel/www/angie-service.do
index e464965..24763b1 100644
--- a/build/skel/www/angie-service.do
+++ b/build/skel/www/angie-service.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/apr-1.7.4.do b/build/skel/www/apr-1.7.4.do
index 4322960..4926aa5 100644
--- a/build/skel/www/apr-1.7.4.do
+++ b/build/skel/www/apr-1.7.4.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/apr-util-1.6.3.do b/build/skel/www/apr-util-1.6.3.do
index 086a66c..a22a7c4 100644
--- a/build/skel/www/apr-util-1.6.3.do
+++ b/build/skel/www/apr-util-1.6.3.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/curl-8.7.1.do b/build/skel/www/curl-8.7.1.do
index f373fc4..f55e1d6 100644
--- a/build/skel/www/curl-8.7.1.do
+++ b/build/skel/www/curl-8.7.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/curl-with-tls-8.7.1.do b/build/skel/www/curl-with-tls-8.7.1.do
index 0ecf45e..697cf41 100644
--- a/build/skel/www/curl-with-tls-8.7.1.do
+++ b/build/skel/www/curl-with-tls-8.7.1.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/build/skel/www/httpd-2.4.59.do b/build/skel/www/httpd-2.4.59.do
index 7c336db..8270ffd 100644
--- a/build/skel/www/httpd-2.4.59.do
+++ b/build/skel/www/httpd-2.4.59.do
@@ -1,4 +1,4 @@
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/doc/build/tutorial.texi b/doc/build/tutorial.texi
index 2d4f77b..76812b8 100644
--- a/doc/build/tutorial.texi
+++ b/doc/build/tutorial.texi
@@ -5,7 +5,7 @@ One of the most trivial and simple skel of hello world program can be
 made with the following skel in @file{skel/hw.do}:
 
 @example
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
@@ -86,7 +86,7 @@ $ meta4ra-create \
 @item Write the skel file @file{skel/sysutils/parallel-20240122.do} itself:
 
 @example
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../../../..
 sname=$1.do . "$BASS_ROOT"/lib/rc
 . "$BASS_ROOT"/build/skel/common.rc
 
diff --git a/doc/ci/slave.texi b/doc/ci/slave.texi
index 33f2560..283bd6d 100644
--- a/doc/ci/slave.texi
+++ b/doc/ci/slave.texi
@@ -11,7 +11,7 @@ and execute them.
     @command{slave/bin/task-taker} is used for that task:
 
 @example
-$ export BASS_ROOT=/path/to/bass BASS_RC=/path/to/rc
+$ [ -n "$BASS_ROOT" ] || BASS_ROOT=/path/to/bass BASS_RC=/path/to/rc
 $ $BASS_ROOT/slave/bin/task-taker
 @end example
 
diff --git a/lib/rc b/lib/rc
index 96a2dda..e49bc09 100644
--- a/lib/rc
+++ b/lib/rc
@@ -6,6 +6,7 @@ if [ -z "$BASS_ROOT" ] || [ -z "$sname" ] ; then
     echo '"BASS_ROOT"' and '"sname"' must be set by invoking script >&2
     exit 1
 fi
+export BASS_ROOT
 
 NAME="$(basename -- "${sname%.do}")" # name of the skel
 SPATH="$(realpath $sname)" # absolute path to invoking script
diff --git a/master/bin/clone-with-ctr b/master/bin/clone-with-ctr
index a361c40..1708e25 100755
--- a/master/bin/clone-with-ctr
+++ b/master/bin/clone-with-ctr
@@ -4,7 +4,7 @@
 # Copy "src" to "${ctr}${dst}" directories. That scripts assures all
 # necessary fsync-s are called and files are in read-only mode.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . $BASS_ROOT/lib/rc
 
 src="$1"
diff --git a/master/bin/ctr-get b/master/bin/ctr-get
index 39cbdfb..771d46f 100755
--- a/master/bin/ctr-get
+++ b/master/bin/ctr-get
@@ -11,7 +11,7 @@
 # succeeds, then that value is taken (printed out). Also that script
 # tidies "dir" from old counter values.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . $BASS_ROOT/lib/rc
 
 cd ${1:-$TASKS/ctr}
diff --git a/master/bin/notify-non-started b/master/bin/notify-non-started
index bc660af..f51a323 100755
--- a/master/bin/notify-non-started
+++ b/master/bin/notify-non-started
@@ -2,7 +2,7 @@
 
 setopt ERR_EXIT PIPE_FAIL
 
-export BASS_ROOT=$0:a:h:h
+[ -n "$BASS_ROOT" ] || BASS_ROOT=$0:a:h:h
 sname="$0" . $BASS_ROOT/lib/rc
 
 zmodload -F zsh/stat b:zstat
diff --git a/master/bin/notify-non-taken b/master/bin/notify-non-taken
index 9dcc625..65bf332 100755
--- a/master/bin/notify-non-taken
+++ b/master/bin/notify-non-taken
@@ -2,7 +2,7 @@
 
 setopt ERR_EXIT PIPE_FAIL
 
-export BASS_ROOT=$0:a:h:h
+[ -n "$BASS_ROOT" ] || BASS_ROOT=$0:a:h:h
 sname=$0 . $BASS_ROOT/lib/rc
 
 zmodload -F zsh/stat b:zstat
diff --git a/master/bin/reporter b/master/bin/reporter
index 8dc4889..6066991 100755
--- a/master/bin/reporter
+++ b/master/bin/reporter
@@ -16,7 +16,7 @@
 
 setopt ERR_EXIT PIPE_FAIL
 
-export BASS_ROOT=$0:a:h:h:h
+[ -n "$BASS_ROOT" ] || BASS_ROOT=$0:a:h:h:h
 sname=$0 . $BASS_ROOT/lib/rc
 
 ALIVE_TIMEOUT=60
diff --git a/slave/bin/job-starter b/slave/bin/job-starter
index 83efb31..e048a61 100755
--- a/slave/bin/job-starter
+++ b/slave/bin/job-starter
@@ -18,7 +18,7 @@
 task="$1"
 [ -d "$task" ]
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . $BASS_ROOT/lib/rc
 
 FAILED_JOB_WAITTIME=${FAILED_JOB_WAITTIME:-3600}
diff --git a/slave/bin/steps-runner b/slave/bin/steps-runner
index fe840f8..fc553e4 100755
--- a/slave/bin/steps-runner
+++ b/slave/bin/steps-runner
@@ -15,7 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . $BASS_ROOT/lib/rc
 
 [ -n "$BASS_CODE" ]
diff --git a/slave/bin/task-taker b/slave/bin/task-taker
index 7de0da9..aadcd4a 100755
--- a/slave/bin/task-taker
+++ b/slave/bin/task-taker
@@ -20,7 +20,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-export BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
+[ -n "$BASS_ROOT" ] || BASS_ROOT="$(dirname "$(realpath -- "$0")")"/../..
 sname="$0" . $BASS_ROOT/lib/rc
 
 LASTNUM=${LASTNUM:-lastnum}
diff --git a/slave/service/task-taker/run b/slave/service/task-taker/run
index c1db9b6..8947663 100755
--- a/slave/service/task-taker/run
+++ b/slave/service/task-taker/run
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-export BASS_ROOT=$HOME/bass
+[ -n "$BASS_ROOT" ] || BASS_ROOT=$HOME/bass
 export BASS_RC=$BASS_ROOT/slave/rc
 $BASS_ROOT/slave/bin/task-taker || {
     $BASS_ROOT/bin/notify "Failed task-taker" <<EOF