diff --git a/__tests__/setup-go.test.ts b/__tests__/setup-go.test.ts
index 3ab42ee..15e1c7d 100644
--- a/__tests__/setup-go.test.ts
+++ b/__tests__/setup-go.test.ts
@@ -26,8 +26,8 @@ describe('setup-go', () => {
     findSpy = jest.spyOn(tc, 'find');
     inSpy = jest.spyOn(core, 'getInput');
     cnSpy = jest.spyOn(process.stdout, 'write');
-    platSpy = jest.spyOn(sys, 'getPlatform');
-    archSpy = jest.spyOn(sys, 'getArch');
+    platSpy = jest.spyOn(os, 'platform');
+    archSpy = jest.spyOn(os, 'arch');
     dlSpy = jest.spyOn(tc, 'downloadTool');
     exSpy = jest.spyOn(tc, 'extractTar');
     cacheSpy = jest.spyOn(tc, 'cacheDir');
@@ -78,7 +78,7 @@ describe('setup-go', () => {
 
   it('downloads a version not in the cache', async () => {
     platSpy.mockImplementation(() => 'linux');
-    archSpy.mockImplementation(() => 'amd64');
+    archSpy.mockImplementation(() => 'x64');
 
     inSpy.mockImplementation(() => '1.13.1');
     findSpy.mockImplementation(() => '');
@@ -97,7 +97,7 @@ describe('setup-go', () => {
 
   it('does not find a version that does not exist', async () => {
     platSpy.mockImplementation(() => 'linux');
-    archSpy.mockImplementation(() => 'amd64');
+    archSpy.mockImplementation(() => 'x64');
 
     inSpy.mockImplementation(() => '9.99.9');
     findSpy.mockImplementation(() => '');
@@ -118,8 +118,8 @@ describe('setup-go', () => {
   });
 
   it('finds stable match for exact version', async () => {
-    platSpy.mockImplementation(() => 'windows');
-    archSpy.mockImplementation(() => 'amd64');
+    platSpy.mockImplementation(() => 'win32');
+    archSpy.mockImplementation(() => 'x64');
 
     // get request is already mocked
     // spec: 1.13.7 => 1.13.7 (exact)
@@ -133,7 +133,7 @@ describe('setup-go', () => {
 
   it('finds stable match for exact dot zero version', async () => {
     platSpy.mockImplementation(() => 'darwin');
-    archSpy.mockImplementation(() => 'amd64');
+    archSpy.mockImplementation(() => 'x64');
 
     // spec: 1.13.0 => 1.13
     let match: im.IGoVersion | undefined = await im.findMatch('1.13.0', true);
@@ -146,7 +146,7 @@ describe('setup-go', () => {
 
   it('finds latest patch version for minor version spec', async () => {
     platSpy.mockImplementation(() => 'linux');
-    archSpy.mockImplementation(() => 'amd64');
+    archSpy.mockImplementation(() => 'x64');
     core.debug('plat mocks ok');
 
     // spec: 1.13 => 1.13.7 (latest)
@@ -160,7 +160,7 @@ describe('setup-go', () => {
 
   it('finds latest patch version for caret version spec', async () => {
     platSpy.mockImplementation(() => 'linux');
-    archSpy.mockImplementation(() => 'amd64');
+    archSpy.mockImplementation(() => 'x64');
 
     // spec: ^1.13.6 => 1.13.7
     let match: im.IGoVersion | undefined = await im.findMatch('^1.13.6', true);
@@ -172,8 +172,8 @@ describe('setup-go', () => {
   });
 
   it('finds latest version for major version spec', async () => {
-    platSpy.mockImplementation(() => 'linux');
-    archSpy.mockImplementation(() => 'amd64');
+    platSpy.mockImplementation(() => 'windows');
+    archSpy.mockImplementation(() => 'x32');
 
     // spec: 1 => 1.13.7 (latest)
     let match: im.IGoVersion | undefined = await im.findMatch('1', true);
@@ -181,6 +181,6 @@ describe('setup-go', () => {
     let version: string = match ? match.version : '';
     expect(version).toBe('go1.13.7');
     let fileName = match ? match.files[0].filename : '';
-    expect(fileName).toBe('go1.13.7.linux-amd64.tar.gz');
+    expect(fileName).toBe('go1.13.7.windows-386.zip');
   });
 });
diff --git a/dist/index.js b/dist/index.js
index 4aa2bd2..797b301 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -4506,15 +4506,8 @@ module.exports = bytesToUuid;
 
 "use strict";
 
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
 Object.defineProperty(exports, "__esModule", { value: true });
-const os = __importStar(__webpack_require__(87));
+let os = __webpack_require__(87);
 function getPlatform() {
     // darwin and linux match already
     // freebsd not supported yet but future proofed.
@@ -4536,9 +4529,9 @@ function getArch() {
         case 'x64':
             arch = 'amd64';
             break;
-        case 'ppc':
-            arch = 'ppc64';
-            break;
+        // case 'ppc':
+        //   arch = 'ppc64';
+        //   break;
         case 'x32':
             arch = '386';
             break;
diff --git a/src/system.ts b/src/system.ts
index df26907..8dfad42 100644
--- a/src/system.ts
+++ b/src/system.ts
@@ -1,4 +1,4 @@
-import * as os from 'os';
+let os = require('os');
 
 export function getPlatform(): string {
   // darwin and linux match already
@@ -25,9 +25,9 @@ export function getArch(): string {
     case 'x64':
       arch = 'amd64';
       break;
-    case 'ppc':
-      arch = 'ppc64';
-      break;
+    // case 'ppc':
+    //   arch = 'ppc64';
+    //   break;
     case 'x32':
       arch = '386';
       break;