this derivation will be built:
  /nix/store/ghms3dg8gipk2z9kvn5hwlxwk188zz1g-treefmt-check.drv
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/ghms3dg8gipk2z9kvn5hwlxwk188zz1g-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ay1hylbl78pzhhj7f91x0khs0f47xnkd-treefmt-check