these 4 derivations will be built:
  /nix/store/z3clvlj2rgx9b1gar5binbi49zd90d8d-nil.drv
  /nix/store/cg32l2f1wxbjmzp98d59n8mrld218vw4-treefmt.toml.drv
  /nix/store/izfhg2p05nzspw3c5j1sy3z5d9c5783d-treefmt.drv
  /nix/store/7zr4bs4jsjhdnx74hzf8a4yyff7y158n-treefmt-check.drv