systemd unit generation: allow systemd unit overrides#376
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The unit generation script has been vendored from Nixpkgs. In Nixpkgs, there's a "allowCollisions" flag that when enabled, will create a systemd override file if there's a unit name collision. It's enabled for the generation of systemd units but disabled for the generation of systemd-nspawn unit. Systemd-nspawn do not support this override mechanism. In the system-manager case, overrides are always supported, there is no need for such a flag. Removing the flag, removing the "false" condition branch. Adding a fail2ban test which do test both the systemd.packages option and the override mechanism.
jfroche
approved these changes
Feb 27, 2026
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The unit generation script has been vendored from Nixpkgs. In Nixpkgs, there's a "allowCollisions" flag that when enabled, will create a systemd override file if there's a unit name collision.
It's enabled for the generation of systemd units but disabled for the generation of systemd-nspawn unit. Systemd-nspawn do not support this override mechanism.
In the system-manager case, overrides are always supported, there is no need for such a flag.
Removing the flag, removing the "false" condition branch.
Adding a fail2ban test which do test both the systemd.packages option and the override mechanism.