My Ubuntu 18.04 repo is broken with the "Depends: xxx but it is not going to be installed" error. Further investigation makes me believe it is caused by the conflict naming convention of the package versions:
% apt install libqt5gui5
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:
libqt5gui5 : Depends: libxkbcommon-x11-0 (>= 0.5.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
% apt install libxkbcommon-x11-0
The following packages have unmet dependencies:
libxkbcommon-x11-0 : Depends: libxkbcommon0 (= 0.8.0-1) but 0.8.0-1ubuntu0.1 is to be installed
E: Unable to correct problems, you have held broken packages.
% apt-cache policy libxkbcommon0
libxkbcommon0:
Installed: 0.8.0-1ubuntu0.1
Candidate: 0.8.0-1ubuntu0.1
Version table:
*** 0.8.0-1ubuntu0.1 100
100 /var/lib/dpkg/status
0.8.0-1 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
I.e., the libxkbcommon0 was 0.8.0-1ubuntu0.1 when I first installed it, but it is now of version 0.8.0-1 (same version but without the ubuntu0.1), which is causing the trouble all the way up to the "Depends: xxx but it is not going to be installed" error.
How to fix it?
PS. my system:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic
$ uname -rm
4.15.0-20-generic x86_64
I.e., I don't have other non-x86 architectures in my sources.
