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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gnu.org header.s=fencepost-gnu-org header.b=CHP+B2XO; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -3.22 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gnu.org header.s=fencepost-gnu-org header.b=CHP+B2XO; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: BAD7C2B041 X-Spam-Score: -3.22 X-Migadu-Scanner: scn0.migadu.com X-TUID: 5wrnuZqij87u Hi! (Cc: Dave Thompson, the original author of this code.) As you pointed out on IRC, the problem is that =E2=80=98guix shell -C=E2=80= =99 provides /sys whereas =E2=80=98guix shell -CN=E2=80=99 doesn=E2=80=99t. This stems from this call in (gnu build linux-container), which has always been there: (mount-file-systems root mounts #:mount-/proc? (memq 'pid namespaces) #:mount-/sys? (memq 'net namespaces)) This is explained a few lines above: ;; A sysfs mount requires the user to have the CAP_SYS_ADMIN capability in ;; the current network namespace. (when mount-/sys? (mount* "none" (scope "/sys") "sysfs" (logior MS_NOEXEC MS_NOSUID MS_NODEV MS_RDONLY))) As you noticed with =E2=80=98--expose=3D/sys=E2=80=99, bind-mounting /sys d= oesn=E2=80=99t work either (=E2=80=98mount=E2=80=99 fails with EINVAL). Not sure what to do. Thoughts? Ludo=E2=80=99.