"log": {"L1", "os", "fmt", "time"},
 
        // Packages used by testing must be low-level (L2+fmt).
-       "regexp":         {"L2", "regexp/syntax"},
-       "regexp/syntax":  {"L2"},
-       "runtime/debug":  {"L2", "fmt", "io/ioutil", "os", "time"},
-       "runtime/pprof":  {"L2", "fmt", "os", "text/tabwriter"},
-       "runtime/trace":  {"L0"},
-       "text/tabwriter": {"L2"},
+       "regexp":                       {"L2", "regexp/syntax"},
+       "regexp/syntax":                {"L2"},
+       "runtime/debug":                {"L2", "fmt", "io/ioutil", "os", "time"},
+       "runtime/pprof/internal/gzip0": {"L2"},
+       "runtime/pprof":                {"L2", "fmt", "os", "text/tabwriter"},
+       "runtime/trace":                {"L0"},
+       "text/tabwriter":               {"L2"},
 
        "testing":          {"L2", "flag", "fmt", "os", "runtime/debug", "runtime/pprof", "runtime/trace", "time"},
        "testing/iotest":   {"L2", "log"},