ecwolf: cleanup, format

pkgs/games/ecwolf/default.nix

@@ -1,14 +1,5 @@
-{stdenv, lib, fetchurl, makeDesktopItem, copyDesktopItems, cmake, pkg-config, zlib, bzip2, libjpeg, SDL, SDL_mixer, gtk2}:
-
-let
-  desktopItem = makeDesktopItem {
-    name = "ecwolf";
-    exec = "ecwolf";
-    comment = "Enhanced Wolfenstein 3D port";
-    desktopName = "Wolfenstein 3D";
-    categories = "Game;";
-  };
-in
+{ stdenv, lib, fetchurl, makeDesktopItem, copyDesktopItems, cmake, pkg-config, zlib, bzip2, libjpeg, SDL, SDL_mixer, gtk2 }:
+
 stdenv.mkDerivation rec {
   pname = "ecwolf";
   version = "1.3.3";
@@ -18,10 +9,18 @@ stdenv.mkDerivation rec {
     sha256 = "1sbdv672dz47la5a5qwmdi1v258k9kc5dkx7cdj2b6gk8nbm2srl";
   };
 
-  nativeBuildInputs = [ cmake pkg-config ];
-  buildInputs = [ zlib bzip2 libjpeg SDL SDL_mixer gtk2 copyDesktopItems ];
+  nativeBuildInputs = [ cmake copyDesktopItems pkg-config ];
+  buildInputs = [ zlib bzip2 libjpeg SDL SDL_mixer gtk2 ];
 
-  desktopItems = [ desktopItem ];
+  desktopItems = [
+    (makeDesktopItem {
+      name = "ecwolf";
+      exec = "ecwolf";
+      comment = "Enhanced Wolfenstein 3D port";
+      desktopName = "Wolfenstein 3D";
+      categories = "Game;";
+    })
+  ];
 
   # Change the location where the ecwolf executable looks for the ecwolf.pk3
   # file.
@@ -35,7 +34,7 @@ stdenv.mkDerivation rec {
     sed -i -e "s|ecwolf.pk3|$out/share/ecwolf/ecwolf.pk3|" src/version.h
   ''
   # Disable app bundle creation on Darwin. It fails, and it is not needed to run it from the Nix store
-  + lib.optionalString (stdenv.isDarwin) ''
+  + lib.optionalString stdenv.isDarwin ''
     sed -i -e "s|include(\''${CMAKE_CURRENT_SOURCE_DIR}/macosx/install.txt)||" src/CMakeLists.txt
   '';