these 2 derivations will be built:
  /nix/store/9m4z5nmfqglpk653f18r4d824vdz8njf-flake-inputs.drv
  /nix/store/fjhczbmdm2s00wc9m1j7rhykqsx3zvai-check-flake-inputs.drv
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/9m4z5nmfqglpk653f18r4d824vdz8njf-flake-inputs.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ik3dr0sym65vpcj4vna6j5f8fpsjg2zz-flake-inputs
error: Cannot build '/nix/store/fjhczbmdm2s00wc9m1j7rhykqsx3zvai-check-flake-inputs.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/ys61d1d8lymp83vlxax9lrhivzlhxs7y-check-flake-inputs