diff --git a/pkgs/applications/video/gnash/default.nix b/pkgs/applications/video/gnash/default.nix
index 648137f59d1..4a5acad61c9 100644
--- a/pkgs/applications/video/gnash/default.nix
+++ b/pkgs/applications/video/gnash/default.nix
@@ -25,9 +25,6 @@ stdenv.mkDerivation rec {
     done
   '';
 
-  preBuild = ''
-    export NIX_LDFLAGS="$NIX_LDFLAGS -lXext"
-  '';
 
   # XXX: KDE is supported as well so we could make it available optionally.
   buildInputs = [x11 SDL SDL_mixer GStreamer