these 3 derivations will be built:
  /nix/store/1g0wrls9f0jsyccy0mgcl6hgl5qjf1n9-treefmt.toml.drv
  /nix/store/awlazr2fs5xjfpwsykwyd0zbs0r5h7v1-treefmt.drv
  /nix/store/9srx3g1hkc20aw1gbpszbx41nd89j25f-treefmt-check.drv
these 2 paths will be fetched (17.3 MiB download, 69.6 MiB unpacked):
  /nix/store/n4536kxdm0jnxwrd3yfpf2v9c8r81avw-nixfmt-rs-0.4.1
  /nix/store/bgfznhkkfb8hmn3gn5v8fqp69d7pc5hi-python3.14-mypy-2.1.0