diff --git a/package.json b/package.json
index bda9a26f12..9feca07dcd 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "debug-unit": "node --inspect-brk test/test.js",
     "test-doclint": "node utils/doclint/check_public_api/test/test.js && node utils/doclint/preprocessor/test.js",
     "test": "npm run lint --silent && npm run coverage && npm run test-doclint && node utils/testrunner/test/test.js",
-    "install": "node -e \"try { require('./install-development.js'); } catch(e) { }\"",
+    "prepare": "node prepare.js",
     "lint": "([ \"$CI\" = true ] && eslint --quiet -f codeframe --ext js,ts ./src || eslint --ext js,ts ./src) && npm run tsc && npm run doc",
     "doc": "node utils/doclint/cli.js",
     "coverage": "cross-env COVERAGE=true npm run unit",
diff --git a/install-development.js b/prepare.js
similarity index 94%
rename from install-development.js
rename to prepare.js
index fa1cfee176..2ada94891e 100644
--- a/install-development.js
+++ b/prepare.js
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
- // This file is only run when someone clones the github repo for development
+ // This file is only run when someone installs via the github repo
 
 try {
   console.log('Building playwright...');
@@ -56,6 +56,7 @@ async function downloadAndCleanup(browser) {
   // Remove previous revisions.
   const playwright = require('.')[browser];
   const fetcher = playwright._createBrowserFetcher();
+  const localRevisions = await fetcher.localRevisions();
   const cleanupOldVersions = localRevisions.filter(revision => revision !== revisionInfo.revision).map(revision => fetcher.remove(revision));
   await Promise.all([...cleanupOldVersions]);