Ludovic Courtès <ludo@gnu.org> writes:

> David Thompson <dthompson2@worcester.edu> skribis:
>
>> From 468ed9d5eb8eb839ba2ffb39fc6d8301ba6606f5 Mon Sep 17 00:00:00 2001
>> From: David Thompson <dthompson2@worcester.edu>
>> Date: Mon, 2 Feb 2015 15:29:11 -0500
>> Subject: [PATCH] gnu: inkscape: Update to 0.91.
>>
>> * gnu/packages/inkscape.scm (inkscape): Update to 0.91.
>
> [...]
>
>> -              (uri (string-append "mirror://sourceforge/inkscape/inkscape-"
>> -                                  version ".tar.bz2"))
>> +              (uri "https://inkscape.org/en/gallery/item/3854/download")
>
> OK.  As people discussed on IRC, if there are known mirror URLs it may
> be a good idea to add them here.

The Inkscape maintainers uploaded the source release to Launchpad.

Updated patch below.