diff --git a/src/modes/diff.rs b/src/modes/diff.rs
index d9307fa..3773bc0 100644
--- a/src/modes/diff.rs
+++ b/src/modes/diff.rs
@@ -1,6 +1,7 @@
 use crate::compression::CompressionType;
 use std::path::PathBuf;
 use std::str::FromStr;
+use libc::c_int;
 
 use anyhow::{anyhow, Result};
 use clap::Command;
@@ -145,11 +146,9 @@ pub fn mode_diff(
     fn spawn_writer_thread(
         item_path: PathBuf,
         compression_type: CompressionType,
-        fd_write: nix::unistd::Fd,
+        fd_write: c_int,
     ) -> std::thread::JoinHandle<()> {
-        // Convert nix::unistd::Fd to raw fd
-        let raw_fd = fd_write.0;
-        let pipe_writer_raw = unsafe { std::fs::File::from_raw_fd(raw_fd) };
+        let pipe_writer_raw = unsafe { std::fs::File::from_raw_fd(fd_write) };
         std::thread::spawn(move || {
             write_item_to_pipe(
                 item_path,