this derivation will be built:
  /nix/store/606i0hd85jah8nrlbyamwyixfva70y1r-treefmt-check.drv
building '/nix/store/606i0hd85jah8nrlbyamwyixfva70y1r-treefmt-check.drv'
treefmt-check> tribuchet: building on jamie
treefmt-check> treefmt v2.5.0traversed 55 files
treefmt-check> emitted 32 files for processing
treefmt-check> formatted 32 files (1 changed) in 107ms
treefmt-check>  M crates/gc/src/main.rs
treefmt-check> diff --git a/crates/gc/src/main.rs b/crates/gc/src/main.rs
treefmt-check> index 865ecac..b48548a 100644
treefmt-check> --- a/crates/gc/src/main.rs
treefmt-check> +++ b/crates/gc/src/main.rs
treefmt-check> @@ -168,7 +168,9 @@ fn parse_args_from(args: Vec<std::ffi::OsString>) -> Result<Args> {
treefmt-check>  fn init_rayon() {
treefmt-check>      if let Err(e) = rayon::ThreadPoolBuilder::new().build_global() {
treefmt-check>          log::warn!("failed to start rayon thread pool ({e}); falling back to a single thread");
treefmt-check> -        let _ = rayon::ThreadPoolBuilder::new().num_threads(1).build_global();
treefmt-check> +        let _ = rayon::ThreadPoolBuilder::new()
treefmt-check> +            .num_threads(1)
treefmt-check> +            .build_global();
treefmt-check>      }
treefmt-check>  }
treefmt-check>  
error: Cannot build '/nix/store/606i0hd85jah8nrlbyamwyixfva70y1r-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/da5hjh7qj9gvkn0v982mqrh1a7nbh82i-treefmt-check
       Last 20 log lines:
       > tribuchet: building on jamie
       > treefmt v2.5.0traversed 55 files
       > emitted 32 files for processing
       > formatted 32 files (1 changed) in 107ms
       >  M crates/gc/src/main.rs
       > diff --git a/crates/gc/src/main.rs b/crates/gc/src/main.rs
       > index 865ecac..b48548a 100644
       > --- a/crates/gc/src/main.rs
       > +++ b/crates/gc/src/main.rs
       > @@ -168,7 +168,9 @@ fn parse_args_from(args: Vec<std::ffi::OsString>) -> Result<Args> {
       >  fn init_rayon() {
       >      if let Err(e) = rayon::ThreadPoolBuilder::new().build_global() {
       >          log::warn!("failed to start rayon thread pool ({e}); falling back to a single thread");
       > -        let _ = rayon::ThreadPoolBuilder::new().num_threads(1).build_global();
       > +        let _ = rayon::ThreadPoolBuilder::new()
       > +            .num_threads(1)
       > +            .build_global();
       >      }
       >  }
       >
       For full logs, run:
         nix log /nix/store/606i0hd85jah8nrlbyamwyixfva70y1r-treefmt-check.drv