these 5 derivations will be built:
  /nix/store/zny23mk9blg4ng4blksm772hrc73s8hr-source.drv
  /nix/store/jpg5r72ihd7yc68qbkpjcgpf415sps9z-but-0.23.2-vendor-staging.drv
  /nix/store/chs84k5hg457iwjdyc5abcrlskbfpsxn-but-0.23.2-vendor.drv
  /nix/store/x6llpx30i0ffha1z88xgjfiqzcvl5jfs-but-0.23.2.drv
  /nix/store/agd130m92ghwihir7lkq5q7s4540fzsp-check-but.drv