Use a mpmc channel instead of the mspc from the std.

4 jobs for master in 56 minutes and 36 seconds (queued for 18 seconds)
Status Job ID Name Coverage
  Test
passed #38078
flatpak

00:45:35

passed #38077
rust:stable

00:24:37

 
  Lint
passed #38080
clippy

00:06:30

passed #38079
rustfmt

00:09:02