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-rw-r--r--pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
index 68c680ca979..547f5f997b9 100644
--- a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     wrapProgram $out/bin/git-remote-hg \
-      --prefix PYTHONPATH : "$(echo ${mercurial}/lib/python*/site-packages):$(echo ${mercurial.python}/lib/python*/site-packages)${stdenv.lib.concatMapStrings (x: ":$(echo ${x}/lib/python*/site-packages)") mercurial.pythonPackages}"
+      --prefix PYTHONPATH : "$(echo ${mercurial}/lib/python*/site-packages):$(echo ${mercurial.python}/lib/python*/site-packages)${stdenv.lib.concatMapStrings (x: ":$(echo ${x}/lib/python*/site-packages)") mercurial.pythonPackages or []}"
   '';
 
   meta = with stdenv.lib; {