wxSVG: refactor

pkgs/by-name/wx/wxSVG/package.nix

···
   wxGTK32,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "wxsvg";
   version = "1.5.25";
 
   src = fetchurl {
-    url = "mirror://sourceforge/project/wxsvg/wxsvg/${version}/wxsvg-${version}.tar.bz2";
+    url = "mirror://sourceforge/project/wxsvg/wxsvg/${finalAttrs.version}/wxsvg-${finalAttrs.version}.tar.bz2";
     hash = "sha256-W/asaDG1S9Ga70jN6PoFctu2PzCu6dUyP2vms/MmU0s=";
   };
 
···
 
   enableParallelBuilding = true;
 
-  meta = with lib; {
+  meta = {
     homepage = "https://wxsvg.sourceforge.net/";
     description = "SVG manipulation library built with wxWidgets";
     mainProgram = "svgview";
···
       wxSVG is C++ library to create, manipulate and render Scalable Vector
       Graphics (SVG) files with the wxWidgets toolkit.
     '';
-    license = licenses.gpl2Plus;
+    license = lib.licenses.gpl2Plus;
     maintainers = [ ];
     inherit (wxGTK32.meta) platforms;
   };
-}
+})