diff --git a/pkgs/games/liquidwar/default.nix b/pkgs/games/liquidwar/default.nix
index 827c7d696c77..e012886c884d 100644
--- a/pkgs/games/liquidwar/default.nix
+++ b/pkgs/games/liquidwar/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   ;
 
   # To avoid problems finding SDL_types.h.
-  configureFlags = [ "CFLAGS=-I${SDL.dev}/include/SDL" ];
+  configureFlags = [ "CFLAGS=-I${lib.getDev SDL}/include/SDL" ];
 
   meta = with lib; {
     description = "Quick tactics game";