Comment 5 for bug 1412909

Here's a portion of the output of an upgrade from Precise to Trusty where libnss-winbind wasn't installed.

Setting up samba (2:4.1.6+dfsg-1ubuntu2.14.04.4) ...
Installing new version of config file /etc/logrotate.d/samba ...
update-alternatives: warning: alternative /usr/bin/smbstatus.samba3 (part of link group smbstatus) doesn't exist; removing from list of alternatives
update-alternatives: warning: /etc/alternatives/smbstatus is dangling; it will be updated with best choice
invoke-rc.d: policy-rc.d denied execution of start.
initctl: Unknown job: smbd
invoke-rc.d: policy-rc.d denied execution of start.
initctl: Unknown job: nmbd
invoke-rc.d: policy-rc.d denied execution of start.
initctl: Unknown job: samba-ad-dc
Removing obsolete conffile /etc/network/if-up.d/samba ...
Setting up winbind (2:4.1.6+dfsg-1ubuntu2.14.04.4) ...
Installing new version of config file /etc/init.d/winbind ...
invoke-rc.d: policy-rc.d denied execution of start.
initctl: Unknown job: winbind
Setting up libpam-winbind:amd64 (2:4.1.6+dfsg-1ubuntu2.14.04.4) ...
Setting up libstdc++6-4.6-dev (4.6.4-6ubuntu2) ...
Setting up perl (5.18.2-2ubuntu1) ...
Setting up libalgorithm-diff-perl (1.19.02-3) ...
Setting up libalgorithm-diff-xs-perl (0.04-2build4) ...
Setting up libarchive-extract-perl (0.70-1) ...
Setting up liblog-message-simple-perl (0.10-1) ...
Setting up libmodule-pluggable-perl (5.1-1) ...
Setting up libpod-latex-perl (0.61-1) ...
Setting up libterm-ui-perl (0.42-1) ...
Setting up libtext-soundex-perl (3.4-1build1) ...
Setting up libtimedate-perl (2.3000-1) ...
Setting up libdpkg-perl (1.17.5ubuntu5.3) ...
Setting up dpkg-dev (1.17.5ubuntu5.3) ...
Setting up build-essential (11.6ubuntu6) ...
Setting up libfile-fcntllock-perl (0.14-2build1) ...
Processing triggers for libc-bin (2.19-0ubuntu6.5) ...
(precise-amd64)root@impulse:/home/bdmurray# ap-tcache policy libnss-winbind
-bash: ap-tcache: command not found
(precise-amd64)root@impulse:/home/bdmurray# apt-cache policy libnss-winbind
libnss-winbind:
  Installed: (none)
  Candidate: 2:4.1.6+dfsg-1ubuntu2.14.04.4
  Version table:
     2:4.1.6+dfsg-1ubuntu2.14.04.4 0
        500 http://192.168.10.7/ubuntu/ trusty-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/universe amd64 Packages
     2:4.1.6+dfsg-1ubuntu2 0
        500 http://192.168.10.7/ubuntu/ trusty/universe amd64 Packages