bug#57611: rust-once-cell (alacritty dependency) build failure

[bdju]

Looks like alacritty can't be built because rust-wayland-commons and 
rust-wayland-client can't be built because rust-once-cell can't be built.

rust-once-cell build log: http://sprunge.us/8t8VaQ

p.s. my guix --version output still shows guix (GNU Guix) 0