these 4 derivations will be built:
  /nix/store/mfga8n896c57xq557d5p9w1ln3sr1wkp-treefmt.toml.drv
  /nix/store/frg94vm2nlj2gkrwcvj0x8zli1q9r5h0-treefmt.drv
  /nix/store/p9v0s3nykmyw14487a9knzx7pcwn8nsv-clan-runtime.drv
  /nix/store/722rmvl5ivi9gxlv2la8h24xwz1vg9kz-clan-cli.drv
this path will be fetched (5.8 MiB download, 17.7 MiB unpacked):
  /nix/store/vd35s6l1w86g8z3wfygsdx0761kdxp7s-rumdl-0.2.55