diff --git a/pkgs/os-specific/linux/pam_login/default.nix b/pkgs/os-specific/linux/pam_login/default.nix
index f1d2eb6bc441..46da3053d20c 100644
--- a/pkgs/os-specific/linux/pam_login/default.nix
+++ b/pkgs/os-specific/linux/pam_login/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation {
 
   # To overcome a gcc 4.4 warning:
   # "#ident is a deprecated GCC extension"
-  patchPhase = ''
+  postPatch = ''
     sed -i s/-Werror// configure
   '';