these 2 derivations will be built:
  /nix/store/b1cghdkg8zfbbn913lz7m5gwpkqjysyv-mcptoon-0.8.25.drv
  /nix/store/jc5nbcvw65a9gxin61iify9z0w6q1m3x-check-mcptoon.drv
building '/nix/store/b1cghdkg8zfbbn913lz7m5gwpkqjysyv-mcptoon-0.8.25.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=21&system=aarch64-darwin'
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/b1cghdkg8zfbbn913lz7m5gwpkqjysyv-mcptoon-0.8.25.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/1fjy9z0nssppp2bvjm3x5y58csnz2a11-mcptoon-0.8.25
         /nix/store/jw50gfsqhs6kl60lq7b8z7kgpjggnidg-mcptoon-0.8.25-dist
error: Cannot build '/nix/store/jc5nbcvw65a9gxin61iify9z0w6q1m3x-check-mcptoon.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/zkv6gchn49nbf2kcgw4vnabj7kbh06r0-check-mcptoon


nixbot: transient error detected, retrying once

these 2 derivations will be built:
  /nix/store/b1cghdkg8zfbbn913lz7m5gwpkqjysyv-mcptoon-0.8.25.drv
  /nix/store/jc5nbcvw65a9gxin61iify9z0w6q1m3x-check-mcptoon.drv
building '/nix/store/b1cghdkg8zfbbn913lz7m5gwpkqjysyv-mcptoon-0.8.25.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=20&system=aarch64-darwin'
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: error: substituter 'https://cache.numtide.com' is disabled
error: Cannot build '/nix/store/b1cghdkg8zfbbn913lz7m5gwpkqjysyv-mcptoon-0.8.25.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/1fjy9z0nssppp2bvjm3x5y58csnz2a11-mcptoon-0.8.25
         /nix/store/jw50gfsqhs6kl60lq7b8z7kgpjggnidg-mcptoon-0.8.25-dist
error: Cannot build '/nix/store/jc5nbcvw65a9gxin61iify9z0w6q1m3x-check-mcptoon.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/zkv6gchn49nbf2kcgw4vnabj7kbh06r0-check-mcptoon