these 3 derivations will be built:
  /nix/store/yi3g95fykzaq4djkr3b5q3kfisjhcp5m-packdir-start.drv
  /nix/store/8x7lc770x6lnhhqfiavvpxz4x9n53skl-vim-pack-dir.drv
  /nix/store/mbaj4grbdv00006n7fkpk49x4zzxy941-neovim-0.12.5.drv