these 2 derivations will be built:
  /nix/store/dqcqy2q7vc14q2987gfz3fy2425885j1-mcptoon-0.8.26.drv
  /nix/store/shzdx9cfcg1fa4w63kj8732644ziar02-check-mcptoon.drv
could not copy /nix/store/6q61dkcghgw02ybicxglpkfknjybrz9s-check-mcptoon: error: gRPC FetchNars failed: upstream connect error or disconnect/reset before headers. reset reason: connection termination
error: some outputs are unexpectedly invalid