[jjacke13]

Hi! We met at FOSSCOMM 2026 in Athens, where you mentioned the Nix packages are experimental. I have been running the flake on a NixOS laptop since, and this is the first and smallest thing I found.

brig-containerd runs mkdir, chmod and install before it exports its PATH, and that PATH has no coreutils. Under services.brig systemd gives the unit a PATH, so it works. Anywhere else, for example the unit started with systemd-run on NixOS, whose default PATH has no coreutils, it stops before containerd starts:

brig-containerd: line 4: mkdir: command not found

Changes

• nix/runtime.nix: export PATH is the first command of brig-containerd, and daemonPath has coreutils.

Tested

NixOS 26.05, x86_64, at edbf7a1.

The built brig-containerd, as a normal user with an empty PATH (env -i PATH=/var/empty sh …/bin/brig-containerd):

main:         line 4: mkdir: command not found
this branch:  chmod: changing permissions of '/run/brig': Operation not permitted

so it gets past mkdir and stops only on root's work.

As root on a fresh NixOS VM with the module's own unit stopped, each build's brig-containerd under systemd-run --collect -p Type=notify -p Delegate=yes -p KillMode=process:

main:         line 4: mkdir: command not found      (unit failed)
this branch:  unit active; brig run -d ubuntu rc=0; brig sh ubuntu answers

nix build .#checks.x86_64-linux.module passes.