[Bug 1758004] Re: [Ubuntu 18.04] Error installing the "Basic Ubuntu Server"

[Colin Watson]

I've implemented proper versioned Provides support in germinate,
uploaded it to Debian unstable, and deployed it on pepo (ftpmaster) and
nusakan (cdimage).  Once Launchpad's Debian import picks up the change
in unstable, I'll sync it to bionic which will close this bug.

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Title:
  FFe [Ubuntu 18.04] Error installing the "Basic Ubuntu Server"

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in germinate package in Ubuntu:
  Fix Committed

Bug description:
  When selecting the "Basic Ubuntu Server" from the installation dialogs
  of the daily-build ISO 390 images, the following error message is
  displayed:

       Installation step failed
       An installation step failed. You can try to run the failing item again from the menu,
       or skip it and choose something else. The failing step is: Select and install software

  At the time of the error, the /var/log/syslog file of the installer
  system showed the following entries:

  Mar 22 08:21:03 in-target: The following information may help to resolve the situation:
  Mar 22 08:21:03 in-target: 
  Mar 22 08:21:03 in-target: The following packages have unmet dependencies:
  Mar 22 08:21:03 in-target:  python3-cryptography : Depends: python3-cffi-backend-api-min (<= 9729) but it is not installable
  Mar 22 08:21:03 in-target:                         Depends: python3-cffi-backend-api-max (>= 9729) but it is not installable
  Mar 22 08:21:03 in-target: E
  Mar 22 08:21:03 in-target: : 
  Mar 22 08:21:03 in-target: Unable to correct problems, you have held broken packages.
  Mar 22 08:21:03 in-target: 
  Mar 22 08:21:03 in-target: tasksel: apt-get failed (100)
  Mar 22 08:21:04 main-menu[366]: WARNING **: Configuring 'pkgsel' failed with error code 1
  Mar 22 08:21:04 main-menu[366]: WARNING **: Menu item 'pkgsel' failed.

  The problem occured when installing from the daily builds from 19.
  through 22. March 2018.

  Installation logs/information from the /var/log/installer directory
  are attached.

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