hgsubversion, mercurial (ppa): разбитые зависимости

Я установил mercurial из PPA, тогда я хотел установить hgsubversion. Это не удается из-за неудовлетворенных зависимостей. Насколько мне известно, они встречаются. Что мне здесь не хватает?

jb@x60 ~ $ apt-cache policy mercurial
mercurial:
  Installed: 2.7-0ppa1
  Candidate: 2.7-0ppa1
  Version table:
 *** 2.7-0ppa1 0
        500 http://ppa.launchpad.net/mercurial-ppa/releases/ubuntu/ raring/main i386 Packages
        100 /var/lib/dpkg/status
     2.2.2-2 0
        500 http://ftp.tu-chemnitz.de/pub/linux/ubuntu/ raring/universe i386 Packages
jb@x60 ~ $ sudo apt-get install hgsubversion
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:
 hgsubversion : Depends: mercurial (>= 1.9.1-1~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Дополнительная информация:

jb@x60 ~ $ lsb_release -a
No LSB modules are available.
Distributor ID: LinuxMint
Description:    Linux Mint 15 Olivia
Release:    15
Codename:   olivia