diff --git a/pkgs/development/tools/yarn2nix-moretea/yarn2nix/lib/urlToName.js b/pkgs/development/tools/yarn2nix-moretea/yarn2nix/lib/urlToName.js
index bd48b84f22d3..d3c7288a50a4 100644
--- a/pkgs/development/tools/yarn2nix-moretea/yarn2nix/lib/urlToName.js
+++ b/pkgs/development/tools/yarn2nix-moretea/yarn2nix/lib/urlToName.js
@@ -22,8 +22,8 @@ function urlToName(url) {
   }
 
   return url
-    .replace('https://registry.yarnpkg.com/', '') // prevents having long directory names
-    .replace(/[@/:-]/g, '_') // replace @ and : and - characters with underscore
+    .replace(/https:\/\/(.)*(.com)\//g, '') // prevents having long directory names
+    .replace(/[@/%:-]/g, '_') // replace @ and : and - and % characters with underscore
 }
 
 module.exports = urlToName