https://www.gnu.org/software/guix/manual/html_node/Packaging-Guidelines.html links to http://hydra.gnu.org/gnu/master which returns 404. J' -- PGP Public key ID: 1024D/2DE827B3 fingerprint = 8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3 See http://sks-keyservers.net or any PGP keyserver for public key.