these 5 derivations will be built:
  /nix/store/vyfrf2b0f9y6pzy4zcafq749zyfp0hkh-source.drv
  /nix/store/0xm1fbq047rg16yj633jp58cdgal4cnw-but-0.23.3-vendor-staging.drv
  /nix/store/89xgqjc3v64dvmfrfdb9m6nlimwdjwwv-but-0.23.3-vendor.drv
  /nix/store/89jfvsd6mqj99ns5qgwmmgdyji5bj9wv-but-0.23.3.drv
  /nix/store/2bci2hmbf1kl72v3ss0940523r93wnmw-check-but.drv