this derivation will be built:
  /nix/store/6859vlcpxsqqbvvsbp5jj2gws3gyk89f-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/6859vlcpxsqqbvvsbp5jj2gws3gyk89f-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/9c8jc46l1fw2wmzb572nic2v6x36pjc0-treefmt-check