these 2 derivations will be built:
  /nix/store/0jwcl33lccwmjdgdyq86vfv58kzzmsfv-pi-1.5.0.drv
  /nix/store/jr2rqndkfl7jwcwx7qb36jbr7il5r608-check-pi.drv
building '/nix/store/jr2rqndkfl7jwcwx7qb36jbr7il5r608-check-pi.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=23&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/jr2rqndkfl7jwcwx7qb36jbr7il5r608-check-pi.drv' on farm.numtide.com:50051
check-pi> elastic-arm-bdb1245a: building jr2rqndkfl7jwcwx7qb36jbr7il5r608-check-pi.drv