diff --git a/packages/@aws-cdk/aws-lambda-nodejs/lib/function.ts b/packages/@aws-cdk/aws-lambda-nodejs/lib/function.ts
index a1c7611e64825..5e4e160eaa717 100644
--- a/packages/@aws-cdk/aws-lambda-nodejs/lib/function.ts
+++ b/packages/@aws-cdk/aws-lambda-nodejs/lib/function.ts
@@ -87,7 +87,10 @@ export class NodejsFunction extends lambda.Function {
       if (!fs.existsSync(props.depsLockFilePath)) {
         throw new Error(`Lock file at ${props.depsLockFilePath} doesn't exist`);
       }
-      depsLockFilePath = props.depsLockFilePath;
+      if (!fs.statSync(props.depsLockFilePath).isFile()) {
+        throw new Error('`depsLockFilePath` should point to a file');
+      }
+      depsLockFilePath = path.resolve(props.depsLockFilePath);
     } else {
       const lockFile = findUp(LockFile.YARN) ?? findUp(LockFile.NPM);
       if (!lockFile) {
diff --git a/packages/@aws-cdk/aws-lambda-nodejs/test/function.test.ts b/packages/@aws-cdk/aws-lambda-nodejs/test/function.test.ts
index 743526d0e3899..d898d312be92c 100644
--- a/packages/@aws-cdk/aws-lambda-nodejs/test/function.test.ts
+++ b/packages/@aws-cdk/aws-lambda-nodejs/test/function.test.ts
@@ -107,6 +107,22 @@ test('throws with non existing lock file', () => {
   })).toThrow(/Lock file at \/does\/not\/exist.lock doesn't exist/);
 });
 
+test('throws when depsLockFilePath is not a file', () => {
+  expect(() => new NodejsFunction(stack, 'handler1', {
+    depsLockFilePath: __dirname,
+  })).toThrow(/\`depsLockFilePath\` should point to a file/);
+});
+
+test('resolves depsLockFilePath to an absolute path', () => {
+  new NodejsFunction(stack, 'handler1', {
+    depsLockFilePath: './package.json',
+  });
+
+  expect(Bundling.bundle).toHaveBeenCalledWith(expect.objectContaining({
+    depsLockFilePath: expect.stringMatching(/@aws-cdk\/aws-lambda-nodejs\/package.json$/),
+  }));
+});
+
 test('resolves entry to an absolute path', () => {
   // WHEN
   new NodejsFunction(stack, 'fn', {