The act runner uses Docker containers without systemd, so the Nix
installer needs --init none for a root-only install.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The DeterminateSystems/nix-installer-action requires Node 18+ but the
Gitea act runner uses Node 16. Use curl installer directly instead.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>