these 4 derivations will be built:
  /nix/store/55fms44wnaad184k6sazmhsvyrcsc1mg-source.drv
  /nix/store/09fsdrdil1rzkgzy849a46brbbj6z226-but-0.22.3-vendor-staging.drv
  /nix/store/3q3kcjs7v934w15fmk775pj7z1apfcc9-but-0.22.3-vendor.drv
  /nix/store/0ry1n13nnzck85v5za8kly0jwwv7y8ga-but-0.22.3.drv