> Could you send an updated patch with this fix, and which adds util-linux
> to ‘linux.scm’ instead?

Attached.

Note that I can't verify the signature.

$ wget https://www.kernel.org/pub/linux/utils/util-linux/v2.21/util-linux-2.21.2.tar.xz
$ wget https://www.kernel.org/pub/linux/utils/util-linux/v2.21/util-linux-2.21.2.tar.sign
$ mv util-linux-2.21.2.tar.sign util-linux-2.21.2.tar.xz.sign
$ gpg --search-keys EC39C284
$ gpg --verify util-linux-2.21.2.tar.xz.sign
[...]
gpg: BAD signature from "Karel Zak <kzak@redhat.com>"

Am I using the wrong signature?

> For this kind of questions, I’d first check the list at
> <http://libreplanet.org/wiki/Software_blacklist>, and then ask for
> advice on the gnu-linux-libre list (see
> <http://lists.nongnu.org/mailman/listinfo/gnu-linux-libre>), which is
> where people knowledgeable in this area are.

"Your request has been forwarded to the list moderator for approval."

> The ‘mirror://kernel.org/’ prefix expands to the above mirror URLs.  See
> ‘url-fetch’ in (guix build download) for details.

It works, but I haven't checked 'url-fetch' yet.