this derivation will be built:
  /nix/store/nlzdwvcw7i7cdh4a7yw1vkzxxxmj6rsy-treefmt-check.drv
building '/nix/store/nlzdwvcw7i7cdh4a7yw1vkzxxxmj6rsy-treefmt-check.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=23&system=aarch64-linux'
building '/nix/store/nlzdwvcw7i7cdh4a7yw1vkzxxxmj6rsy-treefmt-check.drv' on farm.numtide.com:50051
treefmt-check> elastic-arm-d2ba6e41: building nlzdwvcw7i7cdh4a7yw1vkzxxxmj6rsy-treefmt-check.drv
treefmt-check> traversed 555 files
treefmt-check> emitted 374 files for processing
treefmt-check> formatted 374 files (0 changed) in 4.669s
could not copy /nix/store/8ix82yappphlmn1gxk1617dlm8b9asav-treefmt-check: error: gRPC FetchNars failed: upstream connect error or disconnect/reset before headers. reset reason: connection termination
error: some outputs are unexpectedly invalid