···11---- a/src/zc/buildout/easy_install.py 2013-08-27 22:28:40.233718116 +0200
22-+++ b/src/zc/buildout/easy_install.py 2013-10-07 00:29:31.077413935 +0200
33-@@ -227,6 +227,12 @@
11+--- a/src/zc/buildout/buildout.py 2017-08-18 10:06:24.946428977 +0300
22++++ b/src/zc/buildout/buildout.py 2017-08-18 10:08:49.115613364 +0300
33+@@ -382,6 +382,10 @@
44+ if k not in versions
55+ ))
66+77++ # Override versions with available (nix) system packages
88++ for dist in pkg_resources.working_set:
99++ versions[dist.project_name] = SectionKey(dist.version, dist.location)
1010++
1111+ # Absolutize some particular directory, handling also the ~/foo form,
1212+ # and considering the location of the configuration file that generated
1313+ # the setting as the base path, falling back to the main configuration
1414+--- a/src/zc/buildout/easy_install.py 2017-08-18 10:06:24.948428980 +0300
1515++++ b/src/zc/buildout/easy_install.py 2017-08-18 10:07:37.462521740 +0300
1616+@@ -321,6 +321,12 @@
417518 def _satisfied(self, req, source=None):
619 dists = [dist for dist in self._env[req.project_name] if dist in req]