these 3 derivations will be built:
  /nix/store/s3yyd2zw68xpph8h724mfaw3iybmsxp0-treefmt.toml.drv
  /nix/store/z4ja1fjkc5nikiidaxljd222f2vig22m-treefmt.drv
  /nix/store/yyl2xrncvrw8yn7fmc40ypw97qdin649-treefmt-check.drv