these 2 derivations will be built:
  /nix/store/3lam2gvgvha81a73hlaw7bmxg0rpy7hq-aven-0.1.56.drv
  /nix/store/fjy230rv4szxy191l2jdisnz1vhd0p1m-check-aven.drv
building '/nix/store/3lam2gvgvha81a73hlaw7bmxg0rpy7hq-aven-0.1.56.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&restart-grace=900&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/3lam2gvgvha81a73hlaw7bmxg0rpy7hq-aven-0.1.56.drv' on farm.numtide.com:50051
aven-0.1.56> mac02: building 3lam2gvgvha81a73hlaw7bmxg0rpy7hq-aven-0.1.56.drv
building '/nix/store/fjy230rv4szxy191l2jdisnz1vhd0p1m-check-aven.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&restart-grace=900&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/fjy230rv4szxy191l2jdisnz1vhd0p1m-check-aven.drv' on farm.numtide.com:50051
check-aven> mac02: building fjy230rv4szxy191l2jdisnz1vhd0p1m-check-aven.drv