Bzr fast-import not finding installed Hg

[Eli Zaretskii]

> Date: Thu, 11 Nov 2010 10:30:49 +0200
> From: Alexander Belchenko <bialix at ukr.net>
> Cc: bazaar at lists.canonical.com
> 
> IIUC you have installed standalone version of bzr and maybe hg.
> To make sure fast-export-from-hg works you have to install python-based 
> versions of bzr *and* hg. Python-based versions required you to have 
> installed Python interpreter and some additional libs, e.g. pywin32.

Is this required only for import from hg, or in general for
fast-import?

Anyway, this sounds like a grave limitation, or even a bug.  What is
missing in the stand-alone version of bzr to have fast-import fully
supported?