these 3 derivations will be built:
  /nix/store/ydjc2cb025yqz8j0x4dy35cjn4zgkm91-but-0.22.2-vendor-staging.drv
  /nix/store/9qlc1y5f8q32rvinhx8vhcnaahnp9r2z-but-0.22.2-vendor.drv
  /nix/store/yziflvzpjqyygl1pbdr35bx2s6dp2ljm-but-0.22.2.drv