diff --git a/build.rs b/build.rs
index 8bf19e1..3dc4bfe 100644
--- a/build.rs
+++ b/build.rs
@@ -38,6 +38,8 @@ const PROBE: &str = r#"
 "#;
 
 fn main() {
+    println!("cargo:rerun-if-env-changed=RUSTC_BOOTSTRAP");
+
     match compile_probe() {
         Some(status) if status.success() => println!("cargo:rustc-cfg=error_generic_member_access"),
         _ => {}