diff --git a/pkgs/development/python-modules/buildout-nix/default.nix b/pkgs/development/python-modules/buildout-nix/default.nix
index 43e8a45c0cf8..e96429e4033d 100644
--- a/pkgs/development/python-modules/buildout-nix/default.nix
+++ b/pkgs/development/python-modules/buildout-nix/default.nix
@@ -1,11 +1,11 @@
 { fetchurl, stdenv, buildPythonPackage }:
 
 buildPythonPackage {
-  name = "zc.buildout-nix-2.2.1";
+  name = "zc.buildout-nix-2.4.0";
 
   src = fetchurl {
-    url = "https://pypi.python.org/packages/source/z/zc.buildout/zc.buildout-2.2.1.tar.gz";
-    md5 = "476a06eed08506925c700109119b6e41";
+    url = "https://pypi.python.org/packages/source/z/zc.buildout/zc.buildout-2.4.0.tar.gz";
+    md5 = "b8323b1ad285544de0c3dc14ee76ddd3";
   };
 
   patches = [ ./nix.patch ];
diff --git a/pkgs/development/python-modules/buildout-nix/nix.patch b/pkgs/development/python-modules/buildout-nix/nix.patch
index dd3b8e12aa89..f358544d36a7 100644
--- a/pkgs/development/python-modules/buildout-nix/nix.patch
+++ b/pkgs/development/python-modules/buildout-nix/nix.patch
@@ -1,38 +1,15 @@
 --- a/src/zc/buildout/easy_install.py	2013-08-27 22:28:40.233718116 +0200
 +++ b/src/zc/buildout/easy_install.py   2013-10-07 00:29:31.077413935 +0200
-@@ -508,16 +508,31 @@
-                         self._dest, os.path.basename(dist.location))
+@@ -227,6 +227,12 @@
  
-                     if os.path.isdir(dist.location):
--                        # we got a directory. It must have been
--                        # obtained locally.  Just copy it.
--                        shutil.copytree(dist.location, newloc)
-+                        # Replace links to garbage collected eggs in
-+                        # /nix/store
-+                        if os.path.islink(newloc):
-+                            # It seems necessary to jump through these
-+                            # hoops, otherwise we end up in an
-+                            # infinite loop because
-+                            # self._env.best_match fails to find the dist
-+                            os.remove(newloc)
-+                            dist = self._fetch(avail, tmp, self._download_cache)
-+                            os.symlink(dist.location, newloc)
-+                            newdist = pkg_resources.Distribution.from_filename(
-+                                newloc)
-+                            self._env.add(newdist)
-+                            logger.info("Updated link to %s" %dist.location)
-+                        # Symlink to the egg in /nix/store
-+                        elif not os.path.exists(newloc):
-+                            os.symlink(dist.location, newloc)
-+                            logger.info("Created link to %s" %dist.location)
-                     else:
- 
- 
-                         setuptools.archive_util.unpack_archive(
-                             dist.location, newloc)
- 
--                    redo_pyc(newloc)
-+                        redo_pyc(newloc)
- 
-                     # Getting the dist from the environment causes the
-                     # distribution meta data to be read.  Cloning isn't
+     def _satisfied(self, req, source=None):
+         dists = [dist for dist in self._env[req.project_name] if dist in req]
++        try:
++            dists = ([dist for dist in dists
++                     if dist.precedence == pkg_resources.DEVELOP_DIST]
++                     + [pkg_resources.get_distribution(req.project_name)])
++        except pkg_resources.DistributionNotFound:
++            pass
+         if not dists:
+             logger.debug('We have no distributions for %s that satisfies %r.',
+                          req.project_name, str(req))