these 2 derivations will be built:
  /nix/store/q3063xrq4limr59gpcv9nk6lmcnpvd3r-treefmt-with-config-2.6.0.drv
  /nix/store/5iypp9bnx3zgm1kdbhjf01dj4yzsn69s-treefmt-with-config-check.drv