diff --git a/src/tools/run-make-support/src/command.rs b/src/tools/run-make-support/src/command.rs
index f39bcfd60df..0a1bd9b0b34 100644
--- a/src/tools/run-make-support/src/command.rs
+++ b/src/tools/run-make-support/src/command.rs
@@ -36,8 +36,10 @@ impl Command {
         Self { cmd: StdCommand::new(program), stdin: None, drop_bomb: DropBomb::arm(program) }
     }
 
-    pub fn set_stdin(&mut self, stdin: Box<[u8]>) {
-        self.stdin = Some(stdin);
+    /// Specify a stdin input
+    pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
+        self.stdin = Some(input.as_ref().to_vec().into_boxed_slice());
+        self
     }
 
     /// Specify an environment variable.
diff --git a/src/tools/run-make-support/src/llvm.rs b/src/tools/run-make-support/src/llvm.rs
index c397bd3b1a0..7f42223bf7f 100644
--- a/src/tools/run-make-support/src/llvm.rs
+++ b/src/tools/run-make-support/src/llvm.rs
@@ -171,7 +171,7 @@ impl LlvmFilecheck {
 
     /// Pipe a read file into standard input containing patterns that will be matched against the .patterns(path) call.
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
-        self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
+        self.cmd.stdin(input);
         self
     }
 
diff --git a/src/tools/run-make-support/src/rustc.rs b/src/tools/run-make-support/src/rustc.rs
index a377dad99d6..28ece1dff12 100644
--- a/src/tools/run-make-support/src/rustc.rs
+++ b/src/tools/run-make-support/src/rustc.rs
@@ -244,7 +244,7 @@ impl Rustc {
 
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
-        self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
+        self.cmd.stdin(input);
         self
     }
 
diff --git a/src/tools/run-make-support/src/rustdoc.rs b/src/tools/run-make-support/src/rustdoc.rs
index 93078561254..fb00427b1c1 100644
--- a/src/tools/run-make-support/src/rustdoc.rs
+++ b/src/tools/run-make-support/src/rustdoc.rs
@@ -92,7 +92,7 @@ impl Rustdoc {
 
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
-        self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
+        self.cmd.stdin(input);
         self
     }