diff --git a/packages/debugger-shell/__tests__/electron-dependency-test.js b/packages/debugger-shell/__tests__/electron-dependency-test.js
index d0be1077d5b..9b785bd7701 100644
--- a/packages/debugger-shell/__tests__/electron-dependency-test.js
+++ b/packages/debugger-shell/__tests__/electron-dependency-test.js
@@ -22,7 +22,7 @@ describe('Electron dependency', () => {
     // $FlowFixMe[untyped-import] - package.json is not typed
     const ourPackageJson = require('../package.json');
 
-    const declaredElectronVersion = ourPackageJson.dependencies.electron;
+    const declaredElectronVersion = ourPackageJson.devDependencies.electron;
     expect(declaredElectronVersion).toBeTruthy();
 
     // $FlowFixMe[untyped-import] - package.json is not typed
diff --git a/packages/debugger-shell/package.json b/packages/debugger-shell/package.json
index 6c1706dd55d..3d268cbfbfd 100644
--- a/packages/debugger-shell/package.json
+++ b/packages/debugger-shell/package.json
@@ -30,10 +30,16 @@
   },
   "dependencies": {
     "cross-spawn": "^7.0.6",
-    "electron": "37.2.6",
     "fb-dotslash": "0.5.8"
   },
   "devDependencies": {
+    "electron": "37.2.6",
     "semver": "^7.1.3"
-  }
+  },
+  "files": [
+    "!**/__tests__/**",
+    "bin",
+    "dist",
+    "!src/electron"
+  ]
 }
diff --git a/packages/debugger-shell/src/node/index.flow.js b/packages/debugger-shell/src/node/index.flow.js
index 3b7e0dbcca6..8490b8f42ed 100644
--- a/packages/debugger-shell/src/node/index.flow.js
+++ b/packages/debugger-shell/src/node/index.flow.js
@@ -29,7 +29,7 @@ async function unstable_spawnDebuggerShellWithArgs(
   args: string[],
   {
     mode = 'detached',
-    flavor = 'dev',
+    flavor = 'prebuilt',
   }: $ReadOnly<{
     // In 'syncAndExit' mode, the current process will block until the spawned process exits, and then it will exit
     // with the same exit code as the spawned process.