these 4 derivations will be built:
  /nix/store/3lz9n6f9wsgzdnnlyhli7iprvp7wzl4l-clan-runtime.drv
  /nix/store/jc5jsfdd35s5v62cdl80r27c5991x2sa-treefmt.toml.drv
  /nix/store/860j0402yyjrrk79l4g3sv2ji02l54z6-treefmt.drv
  /nix/store/f4iyplkpk8npp6g99ybdwcbh7p2qs1wy-clan.drv
this path will be fetched (6.5 MiB download, 20.5 MiB unpacked):
  /nix/store/xffla08bsdkhnma5xxq7lj1sw2wz95ap-rumdl-0.2.64