pi@raspberrypi:~ $ sudo apt-get install koha-common
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:
 koha-common : Depends: libnet-oauth2-authorizationserver-perl but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
pi@raspberrypi:~ $ sudo apt-get install libnet-oauth2-authorizationserver-perl
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:
 libnet-oauth2-authorizationserver-perl : Depends: libcryptx-perl (>= 0.021) but it is not installable
E: Unable to correct problems, you have held broken packages.
pi@raspberrypi:~ $ sudo apt-get install libcryptx-perl:i386
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:
 libcryptx-perl:i386 : Depends: perl:i386 (>= 5.20.2) but it is not installable
                       Depends: libc6:i386 (>= 2.14) but it is not installable
E: Unable to correct problems, you have held broken packages.


The cycle gets vicious.