diff --git a/pkgs/applications/version-management/mercurial/default.nix b/pkgs/applications/version-management/mercurial/default.nix
index 6c58fbd3689a..4d8b2fe27c60 100644
--- a/pkgs/applications/version-management/mercurial/default.nix
+++ b/pkgs/applications/version-management/mercurial/default.nix
@@ -19,8 +19,9 @@ stdenv.mkDerivation {
   inherit python; # pass it so that the same version can be used in hg2git
   pythonPackages = [ curses ];
 
-  buildInputs = [ python makeWrapper docutils unzip ]
-    ++ stdenv.lib.optional stdenv.isDarwin ApplicationServices;
+  buildInputs = [ python makeWrapper docutils unzip ];
+
+  propagatedBuildInputs = stdenv.lib.optional stdenv.isDarwin ApplicationServices;
 
   makeFlags = "PREFIX=$(out)";