these 3 derivations will be built:
  /nix/store/rp55qfw1accax3lh62zpp093c908zcv2-treefmt.toml.drv
  /nix/store/vzasc7mwncx32jjnmag0ih5l0xvsac0k-treefmt.drv
  /nix/store/j8gj7k71y44xppr6xprafs7mbbmmjirr-treefmt-check.drv