these 3 derivations will be built:
  /nix/store/rqkwmjchbhn0xbjbrphkgkbg250p1sh4-treefmt.toml.drv
  /nix/store/2swbcah3h5xyxj3lyclisvqpk9gxx17i-treefmt.drv
  /nix/store/p215wm4ccslaad1hyghb2fxp490971fr-treefmt-check.drv