diff --git a/crates/rsjudge-runner/Cargo.toml b/crates/rsjudge-runner/Cargo.toml
index a99f0b5..9c4c2db 100644
--- a/crates/rsjudge-runner/Cargo.toml
+++ b/crates/rsjudge-runner/Cargo.toml
@@ -13,3 +13,6 @@ caps = "0.5.5"
 nix = { version = "0.28.0", features = ["user"] }
 once_cell = "1.19.0"
 uzers = "0.11.3"
+
+[features]
+setgroups = []
diff --git a/crates/rsjudge-runner/src/lib.rs b/crates/rsjudge-runner/src/lib.rs
index 9a50c91..8bec2aa 100644
--- a/crates/rsjudge-runner/src/lib.rs
+++ b/crates/rsjudge-runner/src/lib.rs
@@ -26,12 +26,17 @@ impl RunAs for Command {
         // and no longer accessible outside it.
         //
         // Replace with `CommandExt::groups` once it's stable.
+        #[cfg(not(feature = "setgroups"))]
         unsafe {
             self.pre_exec(move || {
                 setgroups(&groups)?;
                 Ok(())
             })
         };
+
+        #[cfg(feature = "setgroups")]
+        self.groups(groups);
+
         self
     }
 }