This is the relevant part of the upgrade log for perl, p-common, and p-9.4:
Unpacking perl (5.20.1-1) over (5.18.2-2ubuntu1) ... Selecting previously unselected package libperl5.20. Preparing to unpack .../libperl5.20_5.20.1-1_amd64.deb ... Unpacking libperl5.20 (5.20.1-1) ... [...] Unpacking perl-base (5.20.1-1) over (5.18.2-2ubuntu1) ... [...] Setting up perl-modules (5.20.1-1) ... [...] Setting up perl (5.20.1-1) ... [...] Setting up postgresql-common (162) ... [...] Setting up postgresql-9.4 (9.4~rc1-1~0ubuntu0.14.10) ... Can't locate PgCommon.pm in @INC (you may need to install the PgCommon module) (@INC contains: /usr/share/postgresql-common /usr/local/lib/perl5/site_perl/5.20.0/x86_64-linux /usr/local/lib/perl5/site_perl/5.20.0 /usr/local/lib/perl5/5.20.0/x86_64-linux /usr/local/lib/perl5/5.20.0 .). So the unpack/configure order seems fine to me. But indeed your @INC is incomplete: /usr/share/perl5/ and sr/share/perl/5.20 (and a few others) are missing entirely. Can you please give me the output of these commands: which perl perl -e 'use foo' ** Summary changed: - package postgresql-9.4 9.4~rc1-1~0ubuntu0.14.10 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2 + package postgresql-9.4 9.4~rc1-1~0ubuntu0.14.10 failed to install/upgrade: /usr/share/perl5 missing from perl path ** Package changed: postgresql-9.4 (Ubuntu) => postgresql-common (Ubuntu) ** Changed in: postgresql-common (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1407744 Title: package postgresql-9.4 9.4~rc1-1~0ubuntu0.14.10 failed to install/upgrade: /usr/share/perl5 missing from perl path To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postgresql-common/+bug/1407744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs