python2Packages.pyqt4: partial clean up

(cherry picked from commit 6471655f76ea8c7c9289704e5a11dfcdd1b139e3)

pkgs/development/python-modules/pyqt/4.x.nix

···
-{ stdenv, fetchurl, pythonPackages, qt4, pkgconfig, lndir, dbus, makeWrapper }:
+{ stdenv, fetchurl, buildPythonPackage, python, dbus-python, sip, qt4, pkgconfig, lndir, dbus, makeWrapper }:
 
-let
+buildPythonPackage rec {
   pname = "PyQt-x11-gpl";
   version = "4.12";
-
-  inherit (pythonPackages) buildPythonPackage python dbus-python sip;
-in buildPythonPackage {
-  pname = pname;
-  name = pname + "-" + version;
-  version = version;
   format = "other";
 
   src = fetchurl {
···
     sha256 = "1nw8r88a5g2d550yvklawlvns8gd5slw53yy688kxnsa65aln79w";
   };
 
-  configurePhase = ''
+  postPatch = ''
     mkdir -p $out
     lndir ${dbus-python} $out
     rm -rf "$out/nix-support"
···
       --replace "qt_macx_spec = 'macx-g++'" "qt_macx_spec = 'unsupported/macx-clang-libc++'" # for bootstrapping phase \
     ''}
 
-    configureFlagsArray=( \
-      --confirm-license --bindir $out/bin \
-      --destdir $out/${python.sitePackages} \
-      --plugin-destdir $out/lib/qt4/plugins --sipdir $out/share/sip/PyQt4 \
-      --dbus=${dbus-python}/include/dbus-1.0 --verbose)
-
-    ${python.executable} configure.py $configureFlags "''${configureFlagsArray[@]}"
+    chmod +x configure.py
+    sed -i '1i#!${python.interpreter}' configure.py
   '';
+
+  configureScript = "./configure.py";
+  dontAddPrefix = true;
+  configureFlags = [
+    "--confirm-license"
+    "--bindir=${placeholder "out"}/bin"
+    "--destdir=${placeholder "out"}/${python.sitePackages}"
+    "--plugin-destdir=${placeholder "out"}/lib/qt4/plugins"
+    "--sipdir=${placeholder "out"}/share/sip/PyQt4"
+    "--dbus=${stdenv.lib.getDev dbus-python}/include/dbus-1.0"
+    "--verbose"
+  ];
 
   nativeBuildInputs = [ pkgconfig lndir makeWrapper qt4 ];
   buildInputs = [ qt4 dbus ];

pkgs/top-level/python-packages.nix

···
   pyres = callPackage ../development/python-modules/pyres { };
 
   pyqt4 = callPackage ../development/python-modules/pyqt/4.x.nix {
-    pythonPackages = self;
     inherit (pkgs) pkgconfig;
   };