this derivation will be built:
  /nix/store/b5bbd1iwx6kwnkxbrmycc9bb6jki64js-groups-relay-0-unstable-2025-05-10.drv
Failed to find a machine for remote build!
derivation: b5bbd1iwx6kwnkxbrmycc9bb6jki64js-groups-relay-0-unstable-2025-05-10.drv
required (system, features): (aarch64-linux, [])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])
building '/nix/store/b5bbd1iwx6kwnkxbrmycc9bb6jki64js-groups-relay-0-unstable-2025-05-10.drv'
groups-relay-0-unstable-2025-05-10> tribuchet: building on eliza
groups-relay-0-unstable-2025-05-10> tribuchet worker error: peer error: stale scratch tree /var/lib/tribuchet/a85/scratch could not be removed: Permission denied (os error 13)
error: Cannot build '/nix/store/b5bbd1iwx6kwnkxbrmycc9bb6jki64js-groups-relay-0-unstable-2025-05-10.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/p6j6prg4mygimrdw8zyqkdil5xh52rn6-groups-relay-0-unstable-2025-05-10
       Last 2 log lines:
       > tribuchet: building on eliza
       > tribuchet worker error: peer error: stale scratch tree /var/lib/tribuchet/a85/scratch could not be removed: Permission denied (os error 13)
       For full logs, run:
         nix log /nix/store/b5bbd1iwx6kwnkxbrmycc9bb6jki64js-groups-relay-0-unstable-2025-05-10.drv