these 5 derivations will be built:
  /nix/store/6dhw37kwp5q962jmxixlml5w6sakzxwp-source.drv
  /nix/store/yds03cv3nwf0pcmp94wwryv2difi542j-but-0.23.0-vendor-staging.drv
  /nix/store/9idqj203fqy3d11bz6sg4b0gybqrb9sb-but-0.23.0-vendor.drv
  /nix/store/lavzxa0879ngag7dwg5gidv1v8biyjfi-but-0.23.0.drv
  /nix/store/x29jd24ddrkcmrgckiwj96dr8l5rspwv-check-but.drv