these 3 derivations will be built:
  /nix/store/hcgq97n85f05423pvsa4w211aix5l33f-treefmt.toml.drv
  /nix/store/565b1fi5y4p20hwl0qx2s0k0yvgncijw-treefmt.drv
  /nix/store/gxpxdrqxx6hxvq7x16fb8v8srrjcf069-treefmt-check.drv