these 3 derivations will be built:
  /nix/store/vl7p487y6gafhsbyzzijzx8hhf3ynyip-treefmt.toml.drv
  /nix/store/321bbq11pnfhmabrrmw3mnf7gk5909lx-treefmt.drv
  /nix/store/xdy6h58vl3b246anaip77c37w2d4i5sy-treefmt-check.drv
this path will be fetched (6.0 MiB download, 18.4 MiB unpacked):
  /nix/store/vwgbz9vm1gyxqn6z4fg1jd6va2nzfa3m-rustfmt-1.99.0
building '/nix/store/vl7p487y6gafhsbyzzijzx8hhf3ynyip-treefmt.toml.drv'
treefmt.toml> structuredAttrs is enabled
building '/nix/store/321bbq11pnfhmabrrmw3mnf7gk5909lx-treefmt.drv'
treefmt> structuredAttrs is enabled
building '/nix/store/xdy6h58vl3b246anaip77c37w2d4i5sy-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 22 files
treefmt-check> emitted 10 files for processing
treefmt-check> formatted 10 files (0 changed) in 103ms