Florian Klink
d60f3cf6e9
nix-daemon.socket is used to socket-activate nix-daemon.service when /nix/var/nix/daemon-socket/socket is accessed. In container usecases, sometimes /nix/var/nix/daemon-socket is bind-mounted read-only into the container. In these cases, we want to skip starting nix-daemon.socket. However, since systemd 250, `ConditionPathIsReadWrite` is also not met if /nix/var/nix/daemon-socket doesn't exist at all. This means, a regular NixOS system will skip starting nix-daemon.socket: > [ 237.187747] systemd[1]: Nix Daemon Socket was skipped because of a failed condition check (ConditionPathIsReadWrite=/nix/var/nix/daemon-socket). To prevent this from happening, ship a tmpfiles file that'll cause the directory to be created if it doesn't exist already. In the case of NixOS, we can just add Nix to `systemd.tmpfiles.packages` and have these files picked up automatically. |
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