these 2 derivations will be built:
  /nix/store/r62b56q4h0hmhhr4881n2z9mfzj5lh9h-openresearch-0.2.20.drv
  /nix/store/i0jg9m4mpjkad3q61w7k51l3jjaw8pw9-check-openresearch.drv
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/r62b56q4h0hmhhr4881n2z9mfzj5lh9h-openresearch-0.2.20.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/v1zcqcj2w08i600d2a2bnjwa063p6573-openresearch-0.2.20
error: Cannot build '/nix/store/i0jg9m4mpjkad3q61w7k51l3jjaw8pw9-check-openresearch.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/c66yjryrw01c613vdnzns1by0q4pnssh-check-openresearch