diff --git a/builder/policy/policy.spec.ts b/builder/policy/policy.spec.ts
index 019f0a0..19239f6 100644
--- a/builder/policy/policy.spec.ts
+++ b/builder/policy/policy.spec.ts
@@ -52,3 +52,9 @@ it('should onlyBuiltDependencies set via a file and config', () => {
 it('should return undefined if no policy is set', () => {
   expect(createAllowBuildFunction({})).toBeUndefined()
 })
+
+it('should return undefined if onlyBuiltDependencies is empty array', () => {
+  expect(createAllowBuildFunction({
+    onlyBuiltDependencies: [],
+  })).toBeUndefined()
+})
diff --git a/builder/policy/policy.ts b/builder/policy/policy.ts
index 06a362e..c5d815d 100644
--- a/builder/policy/policy.ts
+++ b/builder/policy/policy.ts
@@ -7,7 +7,7 @@ export function createAllowBuildFunction (
     onlyBuiltDependenciesFile?: string
   }
 ): undefined | ((pkgName: string) => boolean) {
-  if (opts.onlyBuiltDependenciesFile || opts.onlyBuiltDependencies != null) {
+  if (opts.onlyBuiltDependenciesFile || opts.onlyBuiltDependencies?.length) {
     const onlyBuiltDeps = opts.onlyBuiltDependencies ?? []
     if (opts.onlyBuiltDependenciesFile) {
       onlyBuiltDeps.push(...JSON.parse(fs.readFileSync(opts.onlyBuiltDependenciesFile, 'utf8')))