Subject: bug#26303: calibre: conversion error for cbr files, unrar module is missing

From: ng0 <[email-masked]>
Date: Wed, 29 Mar 2017 16:43:34 +0000

Conversion from cbr to epub fails with this last line:

RuntimeError: Failed to load unrar module with error: No module named
unrar

Note that the books I've tried this on only worked with a comic book
reader we do not have in Guix, there are issues with display, pages,
etc.