this derivation will be built:
  /nix/store/8l2aignhn02prlkdzncknq9zayprwd8m-treefmt.toml.drv
this path will be fetched (6.5 MiB download, 19.9 MiB unpacked):
  /nix/store/as2k66jk1l4bvyl3gdqaasaqvm52vx0x-rumdl-0.2.73