diff --git a/pkgs/development/libraries/ncurses/default.nix b/pkgs/development/libraries/ncurses/default.nix
index 2e6de49958ed..5a8e91f8a353 100644
--- a/pkgs/development/libraries/ncurses/default.nix
+++ b/pkgs/development/libraries/ncurses/default.nix
@@ -1,6 +1,6 @@
 {stdenv, fetchurl, unicode ? true}:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation ( rec {
   name = "ncurses-5.7";
   
   src = fetchurl {
@@ -53,4 +53,4 @@ stdenv.mkDerivation rec {
 
     license = "X11";
   };
-}
+} // ( if stdenv.isDarwin then { postFixup = "rm $out/lib/*.so"; } else {} ) )