fixup! Add basic Git mirror

Author: jchristgit

guix/machines/turing.scm

@@ -97,8 +97,7 @@
 
       (define (maybe-description->description org name maybe-description)
         "Transform MAYBE-DESCRIPTION to an actual description."
-        ; XXX: For reasons presently beyond me, this `eq?` does not work as expected.
-        (if (eq? maybe-description "")
+        (if (string=? maybe-description "")
           (string-append "A mirrored copy of the " org "/" name " repository.")
           maybe-description))