these 3 derivations will be built:
  /nix/store/h15a958s9lxm0xchk5gq3nfjwvzfl91c-source.drv
  /nix/store/sg7pfi24z9v3lz2c3bjcbbnhdkvz3n2h-collie-1.22.6.drv
  /nix/store/bsbl595daj0szbix14mpcypf7ncz78qr-check-collie.drv