these 5 derivations will be built:
  /nix/store/8b7wy22xbz346lnf7xbbwrd7bc0ri5i3-source.drv
  /nix/store/yrdf7q3irbhdh8rmm8lmv7h0dxdl3cga-but-0.23.4-vendor-staging.drv
  /nix/store/rzszvmhgaagjd7im6ggshiwwhaar9zig-but-0.23.4-vendor.drv
  /nix/store/sxqbrqlrsigzc0kmr8slkc1lx3ins9ps-but-0.23.4.drv
  /nix/store/hqdy345fc4hlgk5lh31xkxi44zxf74mh-check-but.drv