diff --git a/build/npm/preinstall.ts b/build/npm/preinstall.ts
index 3476fca..e23329f 100644
--- a/build/npm/preinstall.ts
+++ b/build/npm/preinstall.ts
@@ -129,3 +129,3 @@ function installHeaders() {
 	// Refs https://chromium-review.googlesource.com/c/v8/v8/+/6879784
-	if (process.platform === 'linux') {
+	if (process.platform === 'linux' && local) {
 		const homedir = os.homedir();
@@ -133,3 +133,3 @@ function installHeaders() {
 		const nodeGypCache = path.join(cachePath, 'node-gyp');
-		const localHeaderPath = path.join(nodeGypCache, local!.target, 'include', 'node');
+		const localHeaderPath = path.join(nodeGypCache, local.target, 'include', 'node');
 		if (fs.existsSync(localHeaderPath)) {