diff --git a/Cargo.toml b/Cargo.toml
index 35c8a7d..02cf9c2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,9 @@ include = [
     "/lbug-src/third_party",
     "/lbug-src/CMakeLists.txt",
     "/lbug-src/tools/CMakeLists.txt",
+    # Read by the single-file-header step that build.rs enables for source builds.
+    "/lbug-src/scripts/collect-single-file-header.py",
+    "/lbug-src/scripts/headers.txt",
 ]
 
 [dependencies]
diff --git a/build.rs b/build.rs
index 6f1c838..f3ccc21 100644
--- a/build.rs
+++ b/build.rs
@@ -618,6 +618,8 @@ fn build_ffi(
         println!("cargo:rerun-if-changed=lbug-src/third_party");
         println!("cargo:rerun-if-changed=lbug-src/CMakeLists.txt");
         println!("cargo:rerun-if-changed=lbug-src/tools/CMakeLists.txt");
+        println!("cargo:rerun-if-changed=lbug-src/scripts/collect-single-file-header.py");
+        println!("cargo:rerun-if-changed=lbug-src/scripts/headers.txt");
     }
 
     if cfg!(windows) {