zc.buildout 1.5.3-dev-SlapOS-004 is not compatible with slapos.libnetworkcache.

It waits until defined file list is available.

Those extensions are only good in case of extremely complex profiles.

Sometimes O_CLOEXEC is not available.

slapos.zcbworkarounds and slapos.rebootstrap are good in case of Zope related
profiles.

As soon as slapgrid (in slapos.core package) has any package, this package
is passed to used buildout. In this case, beacause of using patched SlapOS
zc.buildout 1.5.3-dev-SlapOS-005, slapos.libnetworkcache will be used.