these 3 derivations will be built:
  /nix/store/a4kqr93d482kdbj836k7jf568jxy7qcz-treefmt.toml.drv
  /nix/store/mqncqnv1fsfak5r67df588viimc5cjgs-treefmt.drv
  /nix/store/5gwplk6vf9kvpk03bn5lh1r10r9ssbd0-nix-shell.drv