soee@TachikomaDell:~$ LANGUAGE=C sudo apt install kde-spectacle -o Debug::pkgProblemResolver=true
Reading package lists... Done
Building dependency tree
Reading state information... Done
Starting pkgProblemResolver with broken count: 1
Starting 2 pkgProblemResolver with broken count: 1
Investigating (0) libkf5screen7 [ amd64 ] < 4:5.6.4-0ubuntu1~ubuntu16.04~ppa1 > ( libs )
Broken libkf5screen7:amd64 Breaks on libkf5screen6 [ amd64 ] < none -> 4:5.5.5-0ubuntu1 > ( universe/libs )
Considering libkf5screen6:amd64 -1 as a solution to libkf5screen7:amd64 17
Added libkf5screen6:amd64 to the remove list
Fixing libkf5screen7:amd64 via keep of libkf5screen6:amd64
Investigating (1) kde-spectacle [ amd64 ] < 15.12.3-0ubuntu2~ubuntu16.04~ppa1 > ( graphics )
Broken kde-spectacle:amd64 Depends on libkf5screen6 [ amd64 ] < none -> 4:5.5.5-0ubuntu1 > ( universe/libs ) (>= 5.1.1)
Considering libkf5screen6:amd64 -1 as a solution to kde-spectacle:amd64 10001
Re-Instated libkf5screen6:amd64
Investigating (1) libkf5screen7 [ amd64 ] < 4:5.6.4-0ubuntu1~ubuntu16.04~ppa1 > ( libs )
Broken libkf5screen7:amd64 Breaks on libkf5screen6 [ amd64 ] < none -> 4:5.5.5-0ubuntu1 > ( universe/libs )
Considering libkf5screen6:amd64 -1 as a solution to libkf5screen7:amd64 17
Added libkf5screen6:amd64 to the remove list
Fixing libkf5screen7:amd64 via keep of libkf5screen6:amd64
Investigating (2) kde-spectacle [ amd64 ] < 15.12.3-0ubuntu2~ubuntu16.04~ppa1 > ( graphics )
Broken kde-spectacle:amd64 Depends on libkf5screen6 [ amd64 ] < none -> 4:5.5.5-0ubuntu1 > ( universe/libs ) (>= 5.1.1)
Considering libkf5screen6:amd64 -1 as a solution to kde-spectacle:amd64 10001
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:
kde-spectacle : Depends: libkf5screen6 (>= 5.1.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.