revert such changes, it should not be mandatory.

buildout.cfg

 [buildout]
 develop = zc.recipe.egg_ z3c.recipe.scripts_ .
-parts = test oltest py eggs
-
-extensions +=
-  mr.developer
-auto-checkout = *
+parts = test oltest py
 
 [py]
 recipe = z3c.recipe.scripts
@@ -31,10 +27,3 @@ defaults =
   '-t',
   '!(bootstrap|selectingpython|selecting-python)',
   ]
-
-[sources]
-slapos.libnetworkcache = git https://git.erp5.org/repos/slapos.libnetworkcache.git
-
-[eggs]
-recipe = zc.recipe.egg
-eggs = slapos.libnetworkcache

dev.py

@@ -131,7 +131,6 @@ if not has_broken_dash_S:
 subprocess.Popen(cmd, env=env).wait()
 
 pkg_resources.working_set.add_entry('src')
-pkg_resources.working_set.add_entry('src/slapos.libnetworkcache')
 
 import zc.buildout.easy_install
 if not os.path.exists('parts'):

setup.py

@@ -82,7 +82,7 @@ setup(
     packages = ['zc', 'zc.buildout'],
     package_dir = {'': 'src'},
     namespace_packages = ['zc'],
-    install_requires = ['setuptools', 'slapos.libnetworkcache'],
+    install_requires = ['setuptools'],
     include_package_data = True,
     entry_points = entry_points,
     extras_require = dict(test=['zope.testing']),