these 3 derivations will be built:
  /nix/store/0rvkr620px4m6x7zww3xxgl63n3prw6d-mardi-gras-0.34.0-go-modules.drv
  /nix/store/z9vqbl0vrm8nsm150r2sws2gyv6ps0s5-mardi-gras-0.34.0.drv
  /nix/store/fzsi48ycg7kyjynzg5hnsq4ka7yvcpb6-check-mardi-gras.drv