Subject: Guile 3.0.7 fails to build on ci.guix.gnu.org

From: Leo Famulari <[email-masked]>
Date: Wed, 12 May 2021 21:34:15 -0400

Guile 3.0.7 failed to build on the build farm, during the test suite.

There's nothing to link to on ci.guix.gnu.org because Cuirass can't
evaluate Guix without Guile.

I've attached the build log.