python: do not delete site.py for now as it breaks existing use cases

see #209, thx shlevy for reporting this

pkgs/development/python-modules/generic/default.nix

@@ -82,7 +82,9 @@ python.stdenv.mkDerivation (attrs // {
     # Remove any site.py files generated by easy_install as these
     # cause collisions. If pth files are to be processed a
     # corresponding site.py needs to be included in the PYTHONPATH.
-    rm -f "$out/lib/${python.libPrefix}"/site-packages/site.py*
+    #
+    # leave them until we have a better solution: see #209
+    #rm -f "$out/lib/${python.libPrefix}"/site-packages/site.py*
 
     ${postInstall}
   '';