diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 205a62f..23792e0 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -13,6 +13,7 @@ jobs:
           python-version: '3.7'
       - uses: actions/checkout@v2
         with:
+          # This is necessary so that we have the tags.
           fetch-depth: 0
       - uses: ./
         with:
@@ -21,7 +22,13 @@ jobs:
       - run: echo $MY_VERSION
 
   complete:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/setup-python@v2
         with:
@@ -30,9 +37,11 @@ jobs:
         with:
           fetch-depth: 0
       - uses: ./
+        id: dunamai
         with:
           install: '1.2.0'
           env-var: MY_VERSION
           command: dunamai from git
           args: --style semver
-      - run: echo $MY_VERSION
+      - run: echo $MY_VERSION from environment variable
+      - run: echo ${{ steps.dunamai.outputs.version }} from outputs
diff --git a/dist/index.js b/dist/index.js
index b84b940..7642530 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -64,15 +64,16 @@ module.exports = require("child_process");
 /***/ }),
 
 /***/ 325:
-/***/ (function(__unusedmodule, __unusedexports, __webpack_require__) {
+/***/ (function(__unusedmodule, exports, __webpack_require__) {
 
 "use strict";
 
+Object.defineProperty(exports, "__esModule", { value: true });
 var core = __webpack_require__(470);
-var execSync = __webpack_require__(129).execSync;
+var child_process_1 = __webpack_require__(129);
 function runCommand(command) {
     console.log("Running command: " + command);
-    return execSync(command);
+    return child_process_1.execSync(command);
 }
 function main() {
     var install = core.getInput("install");
diff --git a/src/index.ts b/src/index.ts
index e32c0de..fd86c18 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,12 +1,12 @@
-const core = require("@actions/core");
-const { execSync } = require("child_process");
+import * as core from "@actions/core";
+import { execSync } from "child_process";
 
 function runCommand(command: string): Buffer {
     console.log(`Running command: ${command}`);
     return execSync(command);
 }
 
-function main() {
+function main(): void {
     const install = core.getInput("install");
     const envVar = core.getInput("env-var");
     const command = core.getInput("command");