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2f3b309f37
Fixes <https://issues.guix.gnu.org/61690>. Until now, this would work: guix shell --no-cwd -CWP -- guix shell -C coreutils -- ls -R /home … but this would not: $ guix shell --no-cwd -CWPN -- guix shell -C coreutils -- ls -R /home guix shell: error: mount: mount "none" on "/tmp/guix-directory.Wnc2OI/sys": Operation not permitted This is annoying and hardly understandable. Since we already disable /sys mounts when sharing the global network namespace is asked (as in ‘guix shell -CN‘), for the very same reason, we can just as well disable /sys mounts anytime it fails with EPERM. * gnu/build/linux-container.scm (mount-file-systems): Silently ignore EPERM when attempting to mount /sys. Change-Id: If85b1d703ab58a98ea9873f4f8fed71a06b7aa63