diff --git a/Cargo.lock b/Cargo.lock
index 62277a370f8..20cc053047c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3367,6 +3367,7 @@ dependencies = [
  "clap",
  "codspeed-divan-compat",
  "fluent",
+ "nix",
  "tempfile",
  "thiserror 2.0.18",
  "unicode-width 0.2.2",
diff --git a/src/uu/df/Cargo.toml b/src/uu/df/Cargo.toml
index 48b793145e0..9b99baa9287 100644
--- a/src/uu/df/Cargo.toml
+++ b/src/uu/df/Cargo.toml
@@ -25,6 +25,9 @@ unicode-width = { workspace = true }
 thiserror = { workspace = true }
 fluent = { workspace = true }
 
+[target.'cfg(unix)'.dependencies]
+nix = { workspace = true, features = ["fs"] }
+
 [dev-dependencies]
 divan = { workspace = true }
 tempfile = { workspace = true }
diff --git a/src/uu/df/src/df.rs b/src/uu/df/src/df.rs
index e0133805f97..51b950dd460 100644
--- a/src/uu/df/src/df.rs
+++ b/src/uu/df/src/df.rs
@@ -301,12 +301,7 @@ fn get_all_filesystems(opt: &Options) -> UResult<Vec<Filesystem>> {
     // Run a sync call before any operation if so instructed.
     if opt.sync {
         #[cfg(not(any(windows, target_os = "redox")))]
-        unsafe {
-            #[cfg(not(target_os = "android"))]
-            uucore::libc::sync();
-            #[cfg(target_os = "android")]
-            uucore::libc::syscall(uucore::libc::SYS_sync);
-        }
+        nix::unistd::sync();
     }
 
     let mut mounts = vec![];