# Please clear broken package from cache of heroku's npm mirror **URL:** \ **Category:** Deployments\ **Tags:** heroku\ **Created:** [November 11, 2015, 10:22am UTC](https://discuss.circleci.com/t/please-clear-broken-package-from-cache-of-herokus-npm-mirror/460 "2015-11-11T10:22:06Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![wheresrhys](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/wheresrhys/32/258_2.png) [@wheresrhys](https://discuss.circleci.com/u/wheresrhys)\ **Post date:** [November 11, 2015, 10:22am UTC](https://discuss.circleci.com/t/please-clear-broken-package-from-cache-of-herokus-npm-mirror/460/1 "2015-11-11T10:22:06Z")
We’ve been having lots of problems building over the past 24 hours which we tracked down to `herkou plugins:install heroku-pipelines` The exact problem was that in heroku’s npm mirror a reference to a subdependency, validator, had become corrupted. Heroku’s cache of that item has now expired and we’ve verified we can install the plugin locally. On circleci it appears a cached copy is still being held somewhere, as evidenced by the error here [https://circleci.com/gh/Financial-Times/next-article/1878](https://circleci.com/gh/Financial-Times/next-article/1878) (note that this still happens even if we build without cache) Do you have your own cache of packages from the heroku npm mirror? If so, could you please clear the broken entry for validator. Many thanks ---
**Author:** ![alexey](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/alexey/32/42_2.png) [@alexey](https://discuss.circleci.com/u/alexey)\ **Post date:** [November 11, 2015, 1:49pm UTC](https://discuss.circleci.com/t/please-clear-broken-package-from-cache-of-herokus-npm-mirror/460/2 "2015-11-11T13:49:16Z")
We don’t cache the npm packages, so the issue should be resolved now. Is that still happening for your project? Sorry for the delay in the invalidation, in any case. ---
**Author:** ![system](https://global.discourse-cdn.com/circleci/original/3X/5/1/511608acda8e85906e15909b57bd0a46c1dbe291.png) [@system](https://discuss.circleci.com/u/system)\ **Post date:** [June 18, 2018, 11:40am UTC](https://discuss.circleci.com/t/please-clear-broken-package-from-cache-of-herokus-npm-mirror/460/3 "2018-06-18T11:40:53Z")