diff --git a/src/dev/build/tasks/create_package_json_task.js b/src/dev/build/tasks/create_package_json_task.js
index be9151503dc310..95b05d13034ec3 100644
--- a/src/dev/build/tasks/create_package_json_task.js
+++ b/src/dev/build/tasks/create_package_json_task.js
@@ -50,7 +50,7 @@ export const CreatePackageJsonTask = {
 
     if (build.isOss()) {
       delete newPkg.dependencies['x-pack'];
-      newPkg.workspaces.packages = newPkg.workspaces.packages.filter(p => p !== 'x-pack');
+      newPkg.workspaces.packages = newPkg.workspaces.packages.filter(p => !p.startsWith('x-pack'));
     }
 
     await write(