these 3 derivations will be built:
  /nix/store/gddl1y301qh7xjd113hp6drm248z03fx-source.drv
  /nix/store/7w7kml659frp9gn9vhphav978zgm8n3d-mardi-gras-0.32.0-go-modules.drv
  /nix/store/8y7rx2bdvxypvm8lw700hx42dx8rc0js-mardi-gras-0.32.0.drv