these 3 derivations will be built:
  /nix/store/7m4nqsf6jkqn5g4jj2y6vy3wk7zcz8ld-treefmt.toml.drv
  /nix/store/87ivp2k7mxhv1mixpvvbzbfzl1xgzldl-treefmt.drv
  /nix/store/zjmyiqlm9msillmnpx160hdssm5mgg45-treefmt-check.drv