Emacs 27.2 is not reproducible. `guix describe` outputs:
``` Generation 24 May 12 2021 18:06:24 (current) guix d6aeebb repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: d6aeebb23639258311fdfb9dbf5f903079fde51a ``` `guix challenge emacs` outputs: ``` /gnu/store/c52rwsavrj62dc50y599zi215ibh6a5h-emacs-27.2 contents differ: local hash: 1d2cwadp5dhjmaw7ai3jnp306iqqs89dw5gm793j84wk0sxpyvhz https://ci.guix.gnu.org/nar/lzip/c52rwsavrj62dc50y599zi215ibh6a5h-emacs-27.2: 1ny8qvr5aha5ffm4mfh70b37512vxkayxq1nd25hsadpfyc19wj5 differing files: /libexec/emacs/27.2/i686-pc-linux-gnu/emacs.pdmp /share/emacs/27.2/lisp/eshell/esh-cmd.elc /share/emacs/27.2/lisp/net/tramp.elc /share/emacs/27.2/lisp/net/tramp-ftp.elc /share/emacs/27.2/lisp/net/tramp-gvfs.elc /share/emacs/27.2/lisp/gnus/mm-extern.elc /share/emacs/27.2/lisp/gnus/gnus-registry.elc /share/emacs/27.2/lisp/gnus/nnmairix.elc /share/emacs/27.2/lisp/gnus/nnir.elc /share/emacs/27.2/lisp/vc/ediff-util.elc /share/emacs/27.2/lisp/cedet/semantic/util.elc /share/emacs/27.2/lisp/cedet/semantic/texi.elc /share/emacs/27.2/lisp/calendar/cal-mayan.elc /share/emacs/27.2/lisp/calendar/cal-persia.elc /share/emacs/27.2/lisp/calendar/cal-tex.elc /share/emacs/27.2/lisp/org/org-agenda.elc /share/emacs/27.2/lisp/org/ox-odt.elc /share/emacs/27.2/lisp/mh-e/mh-junk.elc 1 store items were analyzed: - 0 (0.0%) were identical - 1 (100.0%) differed - 0 (0.0%) were inconclusive ```