these 5 derivations will be built:
  /nix/store/pcwhm30a6kx8z4mqkvlamy7q9iklzlla-source.drv
  /nix/store/lf6zarm5bv49ivh604hljw7hwgriyzml-but-0.23.1-vendor-staging.drv
  /nix/store/3snlfqvzqphz5lqfi9q81ixp0qcvgcka-but-0.23.1-vendor.drv
  /nix/store/pdlbaclp1zvcrpy7d054n24r9fcagvih-but-0.23.1.drv
  /nix/store/2943kqsaq85pcswdv8gjgaki74x1ashz-check-but.drv