diff --git a/pkgs/applications/editors/emacs/macport.nix b/pkgs/applications/editors/emacs/macport.nix
index c5cb0f4655e6..9fdc72ec22e5 100644
--- a/pkgs/applications/editors/emacs/macport.nix
+++ b/pkgs/applications/editors/emacs/macport.nix
@@ -26,6 +26,8 @@ stdenv.mkDerivation rec {
     sha256 = "0f2wzdw2a3ac581322b2y79rlj3c9f33ddrq9allj97r1si6v5xk";
   };
 
+  patches = [ ./clean-env.patch ];
+
   enableParallelBuilding = true;
 
   nativeBuildInputs = [ pkgconfig autoconf automake ];