diff --git a/embassy-stm32-wpan/build.rs b/embassy-stm32-wpan/build.rs
index 4edf73d59..94aac070d 100644
--- a/embassy-stm32-wpan/build.rs
+++ b/embassy-stm32-wpan/build.rs
@@ -1,4 +1,5 @@
-use std::env;
+use std::path::PathBuf;
+use std::{env, fs};
 
 fn main() {
     match env::vars()
@@ -10,6 +11,16 @@ fn main() {
         Err(GetOneError::None) => panic!("No stm32xx Cargo feature enabled"),
         Err(GetOneError::Multiple) => panic!("Multiple stm32xx Cargo features enabled"),
     }
+
+    let out_dir = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+
+    // ========
+    // stm32wb tl_mbox link sections
+
+    let out_file = out_dir.join("tl_mbox.x").to_string_lossy().to_string();
+    fs::write(out_file, fs::read_to_string("tl_mbox.x.in").unwrap()).unwrap();
+    println!("cargo:rustc-link-search={}", out_dir.display());
+    println!("cargo:rerun-if-changed=tl_mbox.x.in");
 }
 
 enum GetOneError {
diff --git a/embassy-stm32/tl_mbox.x.in b/embassy-stm32-wpan/tl_mbox.x.in
similarity index 100%
rename from embassy-stm32/tl_mbox.x.in
rename to embassy-stm32-wpan/tl_mbox.x.in
diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index f71074bcf..40103d322 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -911,16 +911,6 @@ fn main() {
         println!("cargo:rustc-cfg={}x{}", &chip_name[..9], &chip_name[10..11]);
     }
 
-    // ========
-    // stm32wb tl_mbox link sections
-
-    if chip_name.starts_with("stm32wb") {
-        let out_file = out_dir.join("tl_mbox.x").to_string_lossy().to_string();
-        fs::write(out_file, fs::read_to_string("tl_mbox.x.in").unwrap()).unwrap();
-        println!("cargo:rustc-link-search={}", out_dir.display());
-        println!("cargo:rerun-if-changed=tl_mbox.x.in");
-    }
-
     // =======
     // Features for targeting groups of chips