these 3 derivations will be built:
  /nix/store/frzp0hnwhdkhl8c1alz0ag3dvv538vz2-treefmt.toml.drv
  /nix/store/p63cz43ayza8yyaji3mnaqn9bjik0i5j-treefmt.drv
  /nix/store/w180k1civ4bx897y6sikd6s61dw0sa3n-treefmt-check.drv