these 4 derivations will be built:
  /nix/store/lcnw7bw8lj29a3fiasanh4lr29b058m9-source.drv
  /nix/store/89f40vl4gqnfvrhjkz4mwlbmjmnvfwx9-aven-0.1.31-vendor-staging.drv
  /nix/store/a6w67jm60r7304cgwqzszj76ha9q3if4-aven-0.1.31-vendor.drv
  /nix/store/21937gmmlssjhj0qk6a5n03g4vkvfj5i-aven-0.1.31.drv