diff --git a/.changes/fix-optional-chdir.md b/.changes/fix-optional-chdir.md
new file mode 100644
index 0000000..a23e9c8
--- /dev/null
+++ b/.changes/fix-optional-chdir.md
@@ -0,0 +1,5 @@
+---
+"tauri-build": patch
+---
+
+Only change working directory when projectPath is given.
\ No newline at end of file
diff --git a/package.json b/package.json
index 90f6d1a..fbe6ad0 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,8 @@
   "name": "tauri-build",
   "version": "0.1.2-beta.2",
   "description": "TypeScript template action",
-  "main": "lib/main.js",
+  "module": "lib/main.js",
+  "type": "module",
   "scripts": {
     "build": "tsc",
     "format": "prettier --write '**/*.ts'",
diff --git a/src/build-project.ts b/src/build-project.ts
index a4ac368..c0a9d15 100644
--- a/src/build-project.ts
+++ b/src/build-project.ts
@@ -13,8 +13,6 @@ interface BuildOptions {
 }
 
 export async function buildProject(options: BuildOptions): Promise<string[]> {
-  const projectPath = options.projectPath || process.cwd()
-
   let args: string[] = options.args || []
 
   if (options.configPath) {
@@ -25,7 +23,9 @@ export async function buildProject(options: BuildOptions): Promise<string[]> {
     args.push('--target', options.target)
   }
 
-  process.chdir(projectPath)
+  if (options.projectPath) {
+    process.chdir(options.projectPath)
+  }
 
   if (options.runner) {
     await execa(options.runner, ['build', ...args], { stdio: 'inherit' })
diff --git a/tsconfig.json b/tsconfig.json
index f6e7cb5..3354d4c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,12 +1,13 @@
 {
   "compilerOptions": {
     "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "module": "esnext",                       /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
     "outDir": "./lib",                        /* Redirect output structure to the directory. */
     "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     "strict": true,                           /* Enable all strict type-checking options. */
     "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
-    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "moduleResolution": "node"
   },
   "exclude": ["node_modules", "**/*.test.ts"]
 }