diff --git a/pkgs/tools/text/gnupatch/default.nix b/pkgs/tools/text/gnupatch/default.nix
index ff469ddad25b..782c0bec8508 100644
--- a/pkgs/tools/text/gnupatch/default.nix
+++ b/pkgs/tools/text/gnupatch/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   name = "patch-2.6.1";
 
   src =
-    if !(stdenv ? glibc)
+    if stdenv.isDarwin
     then fetchurl {
       # Temporary fix for
       # http://lists.gnu.org/archive/html/bug-patch/2010-01/msg00004.html .