After installing guix-binary-0.13.0.x86_64-linux.tar.xz (on Gentoo amd64 kernel 4.12.12-gentoo) and running "guix package -i glibc-locales", installation of tcsh-6.20.00 failed because of a failed test: "68: nice FAILED (commands.at:896)"
A log of the compile is attached to this email.