these 3 derivations will be built:
  /nix/store/yw20diw3z5nh2hyd4ydlr0q7pfv4fvss-treefmt.toml.drv
  /nix/store/jvb12xgvbgv8plb098qbar3rfb63az3k-treefmt.drv
  /nix/store/z116afm3zddnzcrl6kkhfikw4pas7fh0-treefmt-check.drv