We now have a build attempt on Cuirass: https://ci.guix.gnu.org/build/982993/details
proot-static is required for building relocatable packages. That is on core-updates, but I see the same issue building from source on master, as well as running manually outside of the proot. The check fails on timeout, but test-25069c12 and test-25069c13 are trivial and I can see no reason why these test processes do not terminate immediately rather than execve continually. Greg
