diff --git a/app/src/main.ts b/app/src/main.ts
index 28dead4..6fedc48 100644
--- a/app/src/main.ts
+++ b/app/src/main.ts
@@ -24,10 +24,15 @@ const fileDownloadOptions = { ...appArgs.fileDownloadOptions };
 electronDownload(fileDownloadOptions);
 
 if (appArgs.processEnvs) {
-  Object.keys(appArgs.processEnvs).forEach((key) => {
-    /* eslint-env node */
-    process.env[key] = appArgs.processEnvs[key];
-  });
+  // This is compatibility if just a string was passed.
+  if (typeof appArgs.processEnvs === 'string') {
+    process.env.processEnvs = appArgs.processEnvs;
+  } else {
+    Object.keys(appArgs.processEnvs).forEach((key) => {
+      /* eslint-env node */
+      process.env[key] = appArgs.processEnvs[key];
+    });
+  }
 }
 
 let mainWindow;
diff --git a/app/src/preload.ts b/app/src/preload.ts
index 52c437b..f1832aa 100644
--- a/app/src/preload.ts
+++ b/app/src/preload.ts
@@ -22,7 +22,7 @@ const INJECT_JS_PATH = path.join(__dirname, '..', 'inject/inject.js');
  */
 function setNotificationCallback(createCallback, clickCallback) {
   const OldNotify = window.Notification;
-  const newNotify = (title, opt) => {
+  const newNotify = function (title, opt) {
     createCallback(title, opt);
     const instance = new OldNotify(title, opt);
     instance.addEventListener('click', clickCallback);
diff --git a/package.json b/package.json
index 3591948..9d1c2da 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "lint:format": "prettier --write 'src/**/*.js' 'app/src/**/*.js'",
     "lint": "eslint . --ext .ts",
     "list-outdated-deps": "npm out; cd app && npm out; true",
+    "prepare": "cd ./app && npm install && cd .. && npm run build",
     "test:integration": "jest --testRegex '.*integration-test.js'",
     "test:manual": "npm run build && ./docs/manual-test",
     "test:unit": "jest",
diff --git a/src/cli.ts b/src/cli.ts
index 4a9b137..35936cf 100755
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -52,7 +52,7 @@ function getProcessEnvs(val: string): any {
   if (!val) {
     return {};
   }
-  return { processEnvs: parseJson(val) };
+  return parseJson(val);
 }
 
 function checkInternet(): void {