gistfile1.txt

chromium /tmp: equery belongs /lib/libz.so
[ Searching for file(s) /lib/libz.so in *... ]
sys-libs/zlib-1.2.3-r1 (/lib/libz.so -> libz.so.1.2.3)
chromium /tmp: sudo emerge -uav zlib

These are the packages that would be merged, in order:

Calculating dependencies /

!!! Problem in 'sys-libs/zlib' dependencies.
!!! ['dev-haskell/zlib', 'sys-libs/zlib'] None
Traceback (most recent call last):
  File "/usr/bin/emerge", line 6971, in <module>
    retval = emerge_main()
  File "/usr/bin/emerge", line 6965, in emerge_main
    myopts, myaction, myfiles, spinner)
  File "/usr/bin/emerge", line 6232, in action_build
    retval, favorites = mydepgraph.select_files(myfiles)
  File "/usr/bin/emerge", line 2078, in select_files
    self.mysd = self.select_dep(myroot, myatom, arg=myarg)
  File "/usr/bin/emerge", line 2437, in select_dep
    metadata=selected_pkg[1], rev_dep=rev_deps, arg=arg):
  File "/usr/bin/emerge", line 1785, in create
    portdb.xmatch("match-all", arg) and
  File "/usr/lib/portage/pym/portage.py", line 7365, in xmatch
    mydep = dep_expand(origdep, mydb=self, settings=self.mysettings)
  File "/usr/lib/portage/pym/portage.py", line 5359, in dep_expand
    mydep, mydb=mydb, use_cache=use_cache, settings=settings) + postfix
  File "/usr/lib/portage/pym/portage.py", line 5583, in cpv_expand
    raise ValueError, matches
ValueError: ['dev-haskell/zlib', 'sys-libs/zlib']