* New primop builtins.filterSource, which can be used to filter files

  from a source directory.  All files for which a predicate function
  returns true are copied to the store.  Typical example is to leave
  out the .svn directory:

    stdenv.mkDerivation {
      ...
      src = builtins.filterSource
        (path: baseNameOf (toString path) != ".svn")
        ./source-dir;
      # as opposed to
      #   src = ./source-dir;
    }

  This is important because the .svn directory influences the hash in
  a rather unpredictable and variable way.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 14388a7b56dc..9bcf336a4f66 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -949,7 +949,7 @@ void DerivationGoal::buildDone()
                as that means that someone else can have interfered
                with the build.  Also, the output should be owned by
                the build user. */
-            if ((st.st_mode & (S_IWGRP | S_IWOTH)) ||
+            if ((!S_ISLNK(st.st_mode) && (st.st_mode & (S_IWGRP | S_IWOTH))) ||
                 (buildUser.enabled() && st.st_uid != buildUser.getUID()))
                 throw BuildError(format("suspicious ownership or permission on `%1%'; rejecting this build output") % path);
 #endif