diff --git a/pkgs/applications/version-management/git-and-tools/git-bz/default.nix b/pkgs/applications/version-management/git-and-tools/git-bz/default.nix
index d924437c2e1..4ed9c5c0509 100644
--- a/pkgs/applications/version-management/git-and-tools/git-bz/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-bz/default.nix
@@ -27,6 +27,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     wrapProgram $out/bin/git-bz \
+      --prefix PYTHONPATH : "$(toPythonPath "${pythonPackages.pycrypto}")" \
       --prefix PYTHONPATH : "$(toPythonPath "${pythonPackages.pysqlite}")"
   '';