add python2nix

pkgs/tools/package-management/python2nix/default.nix

···
+{ stdenv, fetchFromGitHub, pythonPackages }:
+
+
+pythonPackages.buildPythonPackage rec {
+  name = "python2nix-dev";
+ 
+  # TODO: change to upstream once https://github.com/proger/python2nix/pull/3 is merged
+  src = fetchFromGitHub {
+    owner = "iElectric";
+    repo = "python2nix";
+    rev = "734de5f680425c6298eff46481e5e717d6e141a9";
+    sha256 = "09qpzml38rplbr7vhplhzy3iy5n9fd3ba5b9r9cp6d08sk5xidqf";
+  };
+
+  propagatedBuildInputs = with pythonPackages; [ requests pip setuptools ];
+
+  meta = with stdenv.lib; {
+    maintainers = [ maintainers.iElectric ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

···
     inherit (python27Packages) recursivePthLoader;
   };
 
+  python2nix = callPackage ../tools/package-management/python2nix { };
+
   pythonDocs = recurseIntoAttrs (import ../development/interpreters/python/docs {
     inherit stdenv fetchurl lib;
   });