pkgs/games: pkg-config -> pkgconfig (2)

pkgs/games/frogatto/engine.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, which
 , boost, SDL2, SDL2_image, SDL2_mixer, SDL2_ttf
-, glew, zlib, icu, pkgconfig, cairo, libvpx }:
+, glew, zlib, icu, pkg-config, cairo, libvpx }:
 
 stdenv.mkDerivation {
   pname = "anura-engine";
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [
-    which pkgconfig
+    which pkg-config
   ];
 
   buildInputs = [