this derivation will be built:
  /nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv
building '/nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv' on 'ssh-ng://customer@mac02'
building '/nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 332 files
treefmt-check> emitted 262 files for processing
treefmt-check> formatted 262 files (2 changed) in 195ms
treefmt-check>  M Cargo.toml
treefmt-check>  M harmonia-file-nar/src/archive/byte_stream.rs
treefmt-check> diff --git a/Cargo.toml b/Cargo.toml
treefmt-check> index db2dcd8..a48d837 100644
treefmt-check> --- a/Cargo.toml
treefmt-check> +++ b/Cargo.toml
treefmt-check> @@ -44,10 +44,10 @@ version = "3.1.0"
treefmt-check>  
treefmt-check>  [workspace.dependencies]
treefmt-check>  async-stream = "0.3"
treefmt-check> -blake3       = "1.8"
treefmt-check> -bstr         = "1.11"
treefmt-check> -bytes        = "1.11"
treefmt-check> -cap-std      = "3"
treefmt-check> +blake3 = "1.8"
treefmt-check> +bstr = "1.11"
treefmt-check> +bytes = "1.11"
treefmt-check> +cap-std = "3"
treefmt-check>  data-encoding = "2.11"
treefmt-check>  derive_more = { version = "2.1", features = [ "display" ] }
treefmt-check>  ed25519-dalek = "2"
treefmt-check> diff --git a/harmonia-file-nar/src/archive/byte_stream.rs b/harmonia-file-nar/src/archive/byte_stream.rs
treefmt-check> index 9ea0c2e..aeae3f3 100644
treefmt-check> --- a/harmonia-file-nar/src/archive/byte_stream.rs
treefmt-check> +++ b/harmonia-file-nar/src/archive/byte_stream.rs
treefmt-check> @@ -43,9 +43,7 @@ impl NarByteStream {
treefmt-check>          // parent directory and then navigate to the child.
treefmt-check>          let source: DirSource = if path.is_dir() {
treefmt-check>              let dir = Dir::open_ambient_dir(&path, ambient_authority()).await?;
treefmt-check> -            DirSource::open(dir)
treefmt-check> -                .await
treefmt-check> -                .map_err(io::Error::other)?
treefmt-check> +            DirSource::open(dir).await.map_err(io::Error::other)?
treefmt-check>          } else {
treefmt-check>              let parent = path
treefmt-check>                  .parent()
treefmt-check> @@ -56,13 +54,8 @@ impl NarByteStream {
treefmt-check>                  .to_str()
treefmt-check>                  .ok_or_else(|| io::Error::other("non-UTF-8 file name"))?;
treefmt-check>              let dir = Dir::open_ambient_dir(parent, ambient_authority()).await?;
treefmt-check> -            let parent_source = DirSource::open(dir)
treefmt-check> -                .await
treefmt-check> -                .map_err(io::Error::other)?;
treefmt-check> -            parent_source
treefmt-check> -                .open(name)
treefmt-check> -                .await
treefmt-check> -                .map_err(io::Error::other)?
treefmt-check> +            let parent_source = DirSource::open(dir).await.map_err(io::Error::other)?;
treefmt-check> +            parent_source.open(name).await.map_err(io::Error::other)?
treefmt-check>          };
treefmt-check>  
treefmt-check>          // Write NAR to a duplex stream, read chunks and send to channel
error: build of '/nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/sw4g533mpz262qz3vwhyhs9vi33a2c8d-treefmt-check
       Last 25 log lines:
       >          let source: DirSource = if path.is_dir() {
       >              let dir = Dir::open_ambient_dir(&path, ambient_authority()).await?;
       > -            DirSource::open(dir)
       > -                .await
       > -                .map_err(io::Error::other)?
       > +            DirSource::open(dir).await.map_err(io::Error::other)?
       >          } else {
       >              let parent = path
       >                  .parent()
       > @@ -56,13 +54,8 @@ impl NarByteStream {
       >                  .to_str()
       >                  .ok_or_else(|| io::Error::other("non-UTF-8 file name"))?;
       >              let dir = Dir::open_ambient_dir(parent, ambient_authority()).await?;
       > -            let parent_source = DirSource::open(dir)
       > -                .await
       > -                .map_err(io::Error::other)?;
       > -            parent_source
       > -                .open(name)
       > -                .await
       > -                .map_err(io::Error::other)?
       > +            let parent_source = DirSource::open(dir).await.map_err(io::Error::other)?;
       > +            parent_source.open(name).await.map_err(io::Error::other)?
       >          };
       >  
       >          // Write NAR to a duplex stream, read chunks and send to channel
       For full logs, run:
         nix log /nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv
error: Cannot build '/nix/store/d4ymkln9g25b1ra8r6w77d7gn6kgbshq-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/sw4g533mpz262qz3vwhyhs9vi33a2c8d-treefmt-check