cannot upgrade bitmask packages

--- leap/client » sudo apt-get upgrade              
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages have been kept back:
  bitmask leap-mail
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

--- leap/client » sudo apt-get install bitmask leap-mail
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:
 bitmask : Depends: python-leap-common (>= 0.3.7) but 0.3.7~rc+0~20131223071258.16+saucy~1.gbpbfdad9 is to be installed
           Depends: soledad-client (>= 0.5.0) but 0.5.0~rc+0~20131223071206.60+saucy~1.gbp5bb1e9 is to be installed
           Depends: leap-mail (>= 0.3.9) but 0.3.9~rc+0~20131223071827.38+saucy~1.gbp217975 is to be installed
           Recommends: xul-ext-bitmask but it is not going to be installed
 leap-mail : Depends: soledad-client (>= 0.5.0) but 0.5.0~rc+0~20131223071206.60+saucy~1.gbp5bb1e9 is to be installed
             Depends: python-leap-common (>= 0.3.7) but 0.3.7~rc+0~20131223071258.16+saucy~1.gbpbfdad9 is to be installed
E: Unable to correct problems, you have held broken packages.

(from redmine: created on 2013-12-23, closed on 2013-12-23, relates #4827 (closed), relates #4834 (closed))