diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index adb9acb..6767dc5 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -9,3 +9,4 @@
 # Names should be added to this file as:
 #     Name <email address>
 Surma <surma@google.com>
+Amin Ya <aminyahyaabadi74@gmail.com>
diff --git a/index.js b/index.js
index 195391a..8845616 100644
--- a/index.js
+++ b/index.js
@@ -111,7 +111,7 @@ function asc(opts) {
         const params = [
           id,
           "-b",
-          relative(process.env.PWD, wasmFilePath),
+          wasmFilePath,
           ...(shouldGenerateSourceMaps(opts)
             ? [
                 `--sourceMap=${renderNamePattern(opts.sourceMapURLPattern, {
diff --git a/test/main2.js b/test/main2.js
new file mode 100644
index 0000000..c7ecfab
--- /dev/null
+++ b/test/main2.js
@@ -0,0 +1,13 @@
+import { modulePromise } from "asc:./subtraction.ts";
+
+modulePromise
+  .then((module) => WebAssembly.instantiate(module, {}))
+  .then((instance) => {
+    assert(instance.exports.subtract(40, 2) === 38);
+  });
+
+function assert(val) {
+  if (!val) {
+    throw Error(`Assertaion failed`);
+  }
+}
diff --git a/test/rollup.config.js b/test/rollup.config.js
index 8c0f42e..bf19c8d 100644
--- a/test/rollup.config.js
+++ b/test/rollup.config.js
@@ -1,21 +1,32 @@
 let asc = require("../index.js").asc;
 
-export default {
-  input: "main.js",
-  output: {
-    file: "build/main.js",
-    name: "test",
-    format: "umd"
+export default [
+  {
+    input: "main.js",
+    output: {
+      file: "build/umd/main.js",
+      name: "test",
+      format: "umd",
+    },
+    plugins: [
+      asc({
+        fileExtension: ".as",
+        compilerOptions: {
+          optimizeLevel: 3,
+          runtime: "none",
+          //shrinkLevel: 1,
+          //importMemory: true
+        },
+      }),
+    ],
   },
-  plugins: [
-    asc({
-      fileExtension: ".as",
-      compilerOptions: {
-        optimizeLevel: 3,
-        runtime: "none"
-        //shrinkLevel: 1,
-        //importMemory: true
-      }
-    })
-  ]
-};
+  {
+    input: "main2.js",
+    output: {
+      file: "build/es/main.js",
+      name: "test",
+      format: "es",
+    },
+    plugins: [asc()],
+  },
+];
diff --git a/test/subtraction.ts b/test/subtraction.ts
new file mode 100644
index 0000000..b2bafcb
--- /dev/null
+++ b/test/subtraction.ts
@@ -0,0 +1,4 @@
+//@ts-ignore
+export function subctract(a: i32, b: i32): i32 {
+  return a - b;
+}