Is it <https://bugs.gnu.org/44559>?
That bug is about GnuTLS 3.6.12 being written to expire — there is not really much we can do about it. It's happened more than once, too.
- bug#45578: gnutls 3.6.12 can consistently fail to build Chris Marusich
- bug#45578: gnutls 3.6.12 can consistently fail to buil... Leo Famulari
- bug#45578: gnutls 3.6.12 can consistently fail to ... Chris Marusich
