liquidfun: refactor

pkgs/development/libraries/liquidfun/default.nix

@@ -1,21 +1,15 @@
 { lib, stdenv, requireFile, cmake, libGLU, libGL, libX11, libXi }:
 
-let
-  sourceInfo = rec {
-    version="1.1.0";
-    name="liquidfun-${version}";
-    url="https://github.com/google/liquidfun/releases/download/v${version}/${name}";
-    hash="5011a000eacd6202a47317c489e44aa753a833fb562d970e7b8c0da9de01df86";
-  };
-in
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
+  pname = "liquidfun";
+  version = "1.1.0";
+
   src = requireFile {
-    url = sourceInfo.url;
-    sha256 = sourceInfo.hash;
-    name = sourceInfo.name + ".tar.gz";
+    url = "https://github.com/google/liquidfun/releases/download/v${version}/liquidfun-${version}";
+    sha256 = "5011a000eacd6202a47317c489e44aa753a833fb562d970e7b8c0da9de01df86";
+    name = "liquidfun-${version}.tar.gz";
   };
 
-  inherit (sourceInfo) name version;
   nativeBuildInputs = [ cmake ];
   buildInputs = [ libGLU libGL libX11 libXi ];
 
@@ -34,15 +28,12 @@ stdenv.mkDerivation {
     cmake -DBOX2D_INSTALL=ON -DBOX2D_BUILD_SHARED=ON -DCMAKE_INSTALL_PREFIX=$out ..
   '';
 
-  meta = {
+  meta = with lib; {
     description = "2D physics engine based on Box2D";
-    maintainers = with lib.maintainers;
-    [
-      qknight
-    ];
-    platforms = lib.platforms.linux;
-    hydraPlatforms = [];
-    license = lib.licenses.bsd2;
+    maintainers = with maintainers; [ qknight ];
+    platforms = platforms.linux;
+    hydraPlatforms = [ ];
+    license = licenses.bsd2;
     homepage = "https://google.github.io/liquidfun/";
   };
 }