these 3 derivations will be built:
  /nix/store/spw8ydjkr3bwcin65b0z1ljh248wvy7f-treefmt.toml.drv
  /nix/store/9y8fhic4kiz9fyrm5pd0l43z3zd13jq7-treefmt.drv
  /nix/store/xvmkxk8a19fxbjgdngra10g8b3nwwqbp-treefmt-check.drv