pypyPackages.pil: fix build

pkgs/top-level/python-packages.nix

@@ -5785,9 +5785,10 @@ rec {
     buildInputs = [ python pkgs.libjpeg pkgs.zlib pkgs.freetype ];
 
     disabled = isPy3k;
-
     doCheck = true;
     
+    postInstall = "ln -s $out/lib/${python.libPrefix}/site-packages $out/lib/${python.libPrefix}/site-packages/PIL";
+
     preConfigure = ''
       sed -i "setup.py" \
           -e 's|^FREETYPE_ROOT =.*$|FREETYPE_ROOT = libinclude("${pkgs.freetype}")|g ;
@@ -5798,11 +5799,6 @@ rec {
     checkPhase = "${python}/bin/${python.executable} selftest.py";
     buildPhase = "${python}/bin/${python.executable} setup.py build_ext -i";
 
-    postInstall = ''
-      cd "$out"/lib/python*/site-packages
-      ln -s $PWD PIL
-    '';
-
     meta = {
       homepage = http://www.pythonware.com/products/pil/;
       description = "The Python Imaging Library (PIL)";