this derivation will be built:
  /nix/store/2wms91knmscdph3yidjg8g9x5gcip6r3-updater-tests-check.drv
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/2wms91knmscdph3yidjg8g9x5gcip6r3-updater-tests-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/751sccm6yhkm8a7q7lsbnpc665fxc10q-updater-tests-check