xaos: reimplement using mkDerivation

pkgs/applications/graphics/xaos/default.nix

···
-a @ { libXt, libX11, libXext, xextproto, xproto, gsl, aalib, zlib, intltool, gettext, perl, ... }:
-let
-  fetchurl = a.fetchurl;
+{ stdenv, fetchurl, aalib, gsl, libpng, libX11, xproto, libXext
+, xextproto, libXt, zlib, gettext, intltool, perl }:
+
+stdenv.mkDerivation rec {
+  name = "xaos-${version}";
+  version = "3.6";
 
-  version = a.lib.attrByPath ["version"] "3.6" a;
-  buildInputs = with a; [
-    aalib gsl libpng libX11 xproto libXext xextproto
-    libXt zlib gettext intltool perl
-  ];
-in
-rec {
   src = fetchurl {
-    url = "mirror://sourceforge/xaos/xaos-${version}.tar.gz";
+    url = "mirror://sourceforge/xaos/${name}.tar.gz";
     sha256 = "15cd1cx1dyygw6g2nhjqq3bsfdj8sj8m4va9n75i0f3ryww3x7wq";
   };
 
-  inherit buildInputs;
-  configureFlags = [];
+  buildInputs = [
+    aalib gsl libpng libX11 xproto libXext xextproto
+    libXt zlib gettext intltool perl
+  ];
 
-  /* doConfigure should be removed if not needed */
-  phaseNames = ["preConfigure" "doConfigure" "doMakeInstall"];
-
-  preConfigure = a.fullDepEntry (''
+  preConfigure = ''
     sed -e s@/usr/@"$out/"@g -i configure $(find . -name 'Makefile*')
     mkdir -p $out/share/locale
-  '') ["doUnpack" "minInit" "defEnsureDir"];
+  '';
 
-  name = "xaos-" + version;
   meta = {
     homepage = http://xaos.sourceforge.net/;
     description = "Fractal viewer";
-    license = a.stdenv.lib.licenses.gpl2Plus;
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }

pkgs/top-level/all-packages.nix

···
 
   x42-plugins = callPackage ../applications/audio/x42-plugins { };
 
-  xaos = builderDefsPackage (callPackage ../applications/graphics/xaos) {
+  xaos = callPackage ../applications/graphics/xaos {
+    inherit (xlibs) libXt libX11 libXext xextproto xproto;
     libpng = libpng12;
   };