this derivation will be built:
  /nix/store/a2q4f2c4vgzhy15yhb997jhfx6aa3f1z-iets-fmt-0.1.0.drv
error: Cannot build '/nix/store/a2q4f2c4vgzhy15yhb997jhfx6aa3f1z-iets-fmt-0.1.0.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/zzksna1bbhj5p56bi41z6dybikyf8980-iets-fmt-0.1.0
       Last 25 log lines:
       > source root is source
       > Running phase: patchPhase
       > Executing configureCargoCommonVars
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > default configurePhase, nothing to do
       > Running phase: buildPhase
       > +++ command cargo --version
       > cargo 1.98.0 (797e8a9bc 2026-08-05)
       > +++ command cargo fmt -- --check
       > Diff in /build/source/src/sys/fs_windows.rs:2:
       >  //! inode numbers and no inode change time in `std::fs::Metadata`.
       >
       >  use std::fs::{self, DirBuilder, File, Metadata, OpenOptions};
       > +use std::io;
       >  use std::mem;
       >  use std::os::windows::fs::{self as winfs, FileExt, MetadataExt, OpenOptionsExt};
       >  use std::os::windows::io::AsRawHandle;
       > Diff in /build/source/src/sys/fs_windows.rs:8:
       >  use std::path::{Path, PathBuf};
       >  use std::time::{Duration, SystemTime, UNIX_EPOCH};
       > -use std::io;
       > 
       >  use windows_sys::Win32::Storage::FileSystem::{
       >      BY_HANDLE_FILE_INFORMATION, FILE_BASIC_INFO, FILE_FLAG_BACKUP_SEMANTICS,
       For full logs, run:
         nix log /nix/store/a2q4f2c4vgzhy15yhb997jhfx6aa3f1z-iets-fmt-0.1.0.drv