libssl-dev version dependency conflict with installed libssl1.0.0

Ubuntu 14.04 Repositories: universe, main

Ran apt-get update

Ran apt-cache policy libssl1.0.0

ddew@ddew-wsl:~$ apt-cache policy libssl1.0.0
libssl1.0.0:
  Installed: 1.0.1f-1ubuntu2.11
  Candidate: 1.0.1f-1ubuntu2.11
  Version table:
 *** 1.0.1f-1ubuntu2.11 0
        100 /var/lib/dpkg/status
     1.0.1f-1ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

Was surprised to see that the version advertised as the candidate is not the same as what is available from main and that the version available from main is older than the version that is already installed.

Attempted to install libssl-dev

ddew@ddew-wsl:~$ sudo apt-get install libssl-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:
 libssl-dev : Depends: libssl1.0.0 (= 1.0.1f-1ubuntu2) but 1.0.1f-1ubuntu2.11 is to be installed
              Recommends: libssl-doc but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Out of curiosity, ran apt-cache policy libssl-dev

ddew@ddew-wsl:~$ apt-cache policy libssl-dev
libssl-dev:
  Installed: (none)
  Candidate: 1.0.1f-1ubuntu2
  Version table:
     1.0.1f-1ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 

Same problem on Ubuntu 16.04

$ apt-cache policy libssl1.0.0    
libssl1.0.0:
  Installed: 1.0.2g-1ubuntu4.5
  Candidate: 1.0.2g-1ubuntu4.5
  Version table:
 *** 1.0.2g-1ubuntu4.5 100
        100 /var/lib/dpkg/status
     1.0.2g-1ubuntu4.1 500
        500 http://mirror.uoregon.edu/ubuntu xenial-updates/main amd64 Packages
        500 http://mirror.uoregon.edu/ubuntu xenial-security/main amd64 Packages
     1.0.2g-1ubuntu4 500
        500 http://mirror.uoregon.edu/ubuntu xenial/main amd64 Packages

$ apt-cache policy libssl-dev
libssl-dev:
  Installed: (none)
  Candidate: 1.0.2g-1ubuntu4.1
  Version table:
     1.0.2g-1ubuntu4.1 500
        500 http://mirror.uoregon.edu/ubuntu xenial-updates/main amd64 Packages
        500 http://mirror.uoregon.edu/ubuntu xenial-security/main amd64 Packages
     1.0.2g-1ubuntu4 500
        500 http://mirror.uoregon.edu/ubuntu xenial/main amd64 Packages

So I fixed it with

sudo apt-get install libssl1.0.0=1.0.2g-1ubuntu4.1

This worked for me:

Unable to install libssl1.0.0:i386 due to "unmet dependencies"?

sudo apt-get install libssl1.0.0/trusty libssl-dev/trusty openssl/trusty