these 5 derivations will be built:
  /nix/store/pzw54rm3kjyiq6mipkgkycm1f3v3d2rf-packer-1.15.3.drv
  /nix/store/4mildlfld4w07p4am7r76vhvrbsjw90s-treefmt-nix-packer-fmt-wrapper.drv
  /nix/store/dkkb5iwa7f6d7vil43b2v4q79ma55p6f-treefmt.toml.drv
  /nix/store/2iljnk91nw2w3n2clib0w5pn3yvr3ngk-treefmt.drv
  /nix/store/451gcp2y10b2cli6zdfsrw5hmhsync7m-treefmt-check.drv