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-rw-r--r--pkgs/games/curseofwar/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/games/curseofwar/default.nix b/pkgs/games/curseofwar/default.nix
index 6271a60f5b9c0..fef456816ff22 100644
--- a/pkgs/games/curseofwar/default.nix
+++ b/pkgs/games/curseofwar/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     SDL
   ];
 
-  makeFlags = (if isNull SDL then [] else [ "SDL=yes" ]) ++ [
+  makeFlags = (lib.optionals (SDL != null) [ "SDL=yes" ]) ++ [
     "PREFIX=$(out)"
     # force platform's cc on darwin, otherwise gcc is used
     "CC=${stdenv.cc.targetPrefix}cc"