Dirty way of libnetworkached activation of buildout.

src/zc/buildout/buildout.py

@@ -345,6 +345,12 @@ class Buildout(UserDict.DictMixin):
         # Get a base working set for our distributions that corresponds to the
         # stated desires in the configuration.
         distributions = ['setuptools', 'zc.buildout']
+        try:
+          import slapos.libnetworkcache
+        except ImportError:
+          pass
+        else:
+          distributions.append('slapos.libnetworkcache')
         if options.get('offline') == 'true':
             ws = zc.buildout.easy_install.working_set(
                 distributions, options['executable'],
@@ -368,7 +374,14 @@ class Buildout(UserDict.DictMixin):
 
         # Now copy buildout and setuptools eggs, and record destination eggs:
         entries = []
-        for name in 'setuptools', 'zc.buildout':
+        copy_list = ['setuptools', 'zc.buildout']
+        try:
+          import slapos.libnetworkcache
+        except ImportError:
+          pass
+        else:
+          copy_list.append('slapos.libnetworkcache')
+        for name in copy_list:
             r = pkg_resources.Requirement.parse(name)
             dist = ws.find(r)
             if dist.precedence == pkg_resources.DEVELOP_DIST: