diff --git a/src/utils/__tests__/packageMetadata.node.js b/src/utils/__tests__/packageMetadata.node.js
index 205b52e8c..ea62fac44 100644
--- a/src/utils/__tests__/packageMetadata.node.js
+++ b/src/utils/__tests__/packageMetadata.node.js
@@ -5,7 +5,7 @@
  * @format
  */
 
-import {readCurrentRevision} from '../packageMetadata.js';
+import {readCurrentRevision} from '../packageMetadata.tsx';
 
 test('readCurrentRevision does not return something meaningful in dev mode', async () => {
   const ret = await readCurrentRevision();
diff --git a/src/utils/exportData.tsx b/src/utils/exportData.tsx
index 432e0115e..27aea7643 100644
--- a/src/utils/exportData.tsx
+++ b/src/utils/exportData.tsx
@@ -20,7 +20,7 @@ import fs from 'fs';
 import uuid from 'uuid';
 import {remote} from 'electron';
 import {serialize, deserialize} from './serialization';
-import {readCurrentRevision} from './packageMetadata.js';
+import {readCurrentRevision} from './packageMetadata';
 import {tryCatchReportPlatformFailures} from './metrics';
 import {promisify} from 'util';
 import promiseTimeout from './promiseTimeout';
diff --git a/src/utils/packageMetadata.js b/src/utils/packageMetadata.tsx
similarity index 53%
rename from src/utils/packageMetadata.js
rename to src/utils/packageMetadata.tsx
index eaf69ac26..fa29bdd67 100644
--- a/src/utils/packageMetadata.js
+++ b/src/utils/packageMetadata.tsx
@@ -7,7 +7,7 @@
 
 import electron from 'electron';
 import lodash from 'lodash';
-import isProduction from './isProduction.tsx';
+import isProduction from './isProduction';
 import path from 'path';
 import fs from 'fs';
 import {promisify} from 'util';
@@ -17,17 +17,20 @@ const getPackageJSON = async () => {
     isProduction() && electron.remote
       ? electron.remote.app.getAppPath()
       : process.cwd();
-  const content = await promisify(fs.readFile)(path.join(base, 'package.json'));
+  const content = await promisify(fs.readFile)(
+    path.join(base, 'package.json'),
+    'utf-8',
+  );
   return JSON.parse(content);
 };
 
-export const readCurrentRevision: () => Promise<?string> = lodash.memoize(
-  async () => {
-    // This is provided as part of the bundling process for headless.
-    if (global.__REVISION__) {
-      return global.__REVISION__;
-    }
-    const json = await getPackageJSON();
-    return json.revision;
-  },
-);
+export const readCurrentRevision: () => Promise<
+  string | undefined
+> = lodash.memoize(async () => {
+  // This is provided as part of the bundling process for headless.
+  if (global.__REVISION__) {
+    return global.__REVISION__;
+  }
+  const json = await getPackageJSON();
+  return json.revision;
+});
diff --git a/types/nodejs.tsx b/types/nodejs.tsx
index dd85c12c0..5a165885d 100644
--- a/types/nodejs.tsx
+++ b/types/nodejs.tsx
@@ -7,6 +7,7 @@
 
 declare module NodeJS {
   interface Global {
+    __REVISION__: string | undefined;
     electronRequire: (name: string) => void;
     window: Window | undefined;
   }