these 5 derivations will be built:
  /nix/store/hy695rkan53py413g2qgqnlh78c0by5f-source.drv
  /nix/store/f1l8yqa41k9v8kn9j0mda3zs6i0m4cxi-but-0.23.4-vendor-staging.drv
  /nix/store/wdl3jhswjm3wmp7qdf5spgd4gs2fxwx1-but-0.23.4-vendor.drv
  /nix/store/389aq98z093z0wxfrhw11hjzrdrqpy90-but-0.23.4.drv
  /nix/store/a8qhmr92nqmg1bg2n4ryyxw5m6j21rsp-check-but.drv