diff --git a/package.json b/package.json
index dd06a71..26a9c36 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "description": "setup dotnet action",
   "main": "lib/setup-dotnet.js",
   "scripts": {
-    "build": "tsc",
+    "build": "npm install && tsc",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "test": "jest"
diff --git a/src/installer.ts b/src/installer.ts
index 8ffba22..a5312af 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -9,7 +9,7 @@ import * as semver from 'semver';
 const IS_WINDOWS = process.platform === 'win32';
 
 export class DotnetCoreInstaller {
-  constructor(version: string = "", jsonfile: string = "") {
+  constructor(version: string = '', jsonfile: string = '') {
     if (semver.valid(semver.clean(version) || '') == null) {
       throw 'Implicit version not permitted';
     }
@@ -70,17 +70,13 @@ export class DotnetCoreInstaller {
         scriptArguments.concat(['--jsonfile', this.jsonfile]);
       }
 
-      resultCode = await exec.exec(
-        `"${scriptPath}"`,
-        scriptArguments,
-        {
-          listeners: {
-            stdout: (data: Buffer) => {
-              output += data.toString();
-            }
+      resultCode = await exec.exec(`"${scriptPath}"`, scriptArguments, {
+        listeners: {
+          stdout: (data: Buffer) => {
+            output += data.toString();
           }
         }
-      );
+      });
     }
 
     if (resultCode != 0) {
diff --git a/src/setup-dotnet.ts b/src/setup-dotnet.ts
index ffb5acf..08ab9c1 100644
--- a/src/setup-dotnet.ts
+++ b/src/setup-dotnet.ts
@@ -23,7 +23,10 @@ async function run() {
       core.debug('No version found, falling back to global.json');
       const globalJsonPath = path.join(process.cwd(), 'global.json');
       if (fs.existsSync(globalJsonPath)) {
-        const dotnetInstaller = new installer.DotnetCoreInstaller(undefined, globalJsonPath);
+        const dotnetInstaller = new installer.DotnetCoreInstaller(
+          undefined,
+          globalJsonPath
+        );
         await dotnetInstaller.installDotnet();
       }
     }