[Bug 1671003] Re: unable to "apt-get install libsystemd-dev"

[Dimitri John Ledkov]

You appear to have packages installed from xenial-proposed and xenial-updates.
This would indicate that -proposed was enabled at some point in time in the past on this machine.
You need to downgrade packages.

What does downgrade result in?

E.g.: $ sudo apt install libsystemd-dev=229-4ubuntu16
libsystemd0=229-4ubuntu16

And similarly declare any other packages for downgrade, if above still
complaints about systemd related packages.

** Changed in: systemd (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1671003

Title:
  unable to "apt-get install libsystemd-dev"

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  1)
  # lsb_release -rd
  Description:	Ubuntu 16.04.2 LTS
  Release:	16.04

  2) 
  # apt-cache policy libsystemd-dev
  libsystemd-dev:
    Installed: (none)
    Candidate: 229-4ubuntu16
    Version table:
       229-4ubuntu16 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
       229-4ubuntu10 500
          500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
       229-4ubuntu4 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  
  3) I expected the package to be installed

  4) 
  # apt-get install libsystemd-dev
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   libsystemd-dev : Depends: libsystemd0 (= 229-4ubuntu16) but 229-4ubuntu17 is to be installed

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