these 3 derivations will be built:
  /nix/store/hr03f1ja87j9336jibzjrr2m7pvvfh13-source.drv
  /nix/store/75l66ngfnxid5did7sfwjf78mnahaqbk-mardi-gras-0.32.0-go-modules.drv
  /nix/store/f24zpgnfsby1y5gzbxl3kac810m90sl3-mardi-gras-0.32.0.drv