these 2 derivations will be built:
  /nix/store/h3ljz4lk0y1bnb4pwbp33cgdxwaw5hqs-mercat-0.3.8.drv
  /nix/store/dp5127b8m1f12cksvk3bg8y2414p377q-check-mercat.drv
this path will be fetched (101.8 MiB download, 393.3 MiB unpacked):
  /nix/store/nkl5z37clgi8wag15pykv0xqmmyacsli-zig-0.17.1