this derivation will be built:
  /nix/store/vbgcwfi3fc5m0qdaf7j0vz8kdiflnhwg-interpolate-conformance.drv
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/vbgcwfi3fc5m0qdaf7j0vz8kdiflnhwg-interpolate-conformance.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/2dwhswx39hdn8jdk8yqd5w8qm7blnis0-interpolate-conformance