[PKG-Openstack-devel] Bug#810916: python-keystone: package in stable-bpo is not installable

[Chris Butler]

Package: python-keystone
Version: 1:8.0.0-4~bpo8+1
Severity: normal

The packages currently in stable-bpo appear to have an unsatisfiable dependency on python-cryptography >= 1.0

$ sudo apt-get install keystone
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:
 keystone : Depends: python-keystone (= 1:8.0.0-4~bpo8+1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

$ sudo apt-get install python-keystone
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:
 python-keystone : Depends: python-cryptography (>= 1.0) but 0.6.1-1 is to be installed
E: Unable to correct problems, you have held broken packages.

$ apt-cache policy python-cryptography
python-cryptography:
  Installed: 0.6.1-1
  Candidate: 0.8.2-2~bpo8+1
  Version table:
     0.8.2-2~bpo8+1 0
        500 http://ftp.uk.debian.org/debian/ jessie-backports/main amd64 Packages
        500 http://httpredir.debian.org/debian/ jessie-backports/main amd64 Packages
 *** 0.6.1-1 0
        500 http://ftp.uk.debian.org/debian/ jessie/main amd64 Packages
        100 /var/lib/dpkg/status

-- System Information:
Debian Release: 8.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-042stab111.12 (SMP w/16 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_GB.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)