diff --git a/library/compiler-builtins/libm/crates/compiler-builtins-smoke-test/build.rs b/library/compiler-builtins/libm/crates/compiler-builtins-smoke-test/build.rs
index 401b7e1eb3aa..4ee5ab585d50 100644
--- a/library/compiler-builtins/libm/crates/compiler-builtins-smoke-test/build.rs
+++ b/library/compiler-builtins/libm/crates/compiler-builtins-smoke-test/build.rs
@@ -2,6 +2,7 @@
 mod configure;
 
 fn main() {
+    println!("cargo:rerun-if-changed=../../configure.rs");
     let cfg = configure::Config::from_env();
     configure::emit_libm_config(&cfg);
 }
diff --git a/library/compiler-builtins/libm/crates/libm-test/build.rs b/library/compiler-builtins/libm/crates/libm-test/build.rs
index 134fb11ceeb6..d2d0df9cbe92 100644
--- a/library/compiler-builtins/libm/crates/libm-test/build.rs
+++ b/library/compiler-builtins/libm/crates/libm-test/build.rs
@@ -3,6 +3,7 @@ mod configure;
 use configure::Config;
 
 fn main() {
+    println!("cargo:rerun-if-changed=../../configure.rs");
     let cfg = Config::from_env();
     configure::emit_test_config(&cfg);
 }
diff --git a/library/compiler-builtins/libm/crates/util/build.rs b/library/compiler-builtins/libm/crates/util/build.rs
index 0745ef3dd6f3..b6cceb5f11b7 100644
--- a/library/compiler-builtins/libm/crates/util/build.rs
+++ b/library/compiler-builtins/libm/crates/util/build.rs
@@ -4,6 +4,7 @@
 mod configure;
 
 fn main() {
+    println!("cargo:rerun-if-changed=../../configure.rs");
     let cfg = configure::Config::from_env();
     configure::emit_libm_config(&cfg);
 }