# heroku/pack gets stuck **URL:** \ **Category:** Build debugging\ **Created:** [June 20, 2021, 5:17pm UTC](https://community.fly.io/t/heroku-pack-gets-stuck/1741 "2021-06-20T17:17:34Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![david.marquez](https://sea1.discourse-cdn.com/fly1/user_avatar/community.fly.io/david.marquez/32/18126_2.png) [@david.marquez](https://community.fly.io/u/david.marquez)\ **Post date:** [June 20, 2021, 5:17pm UTC](https://community.fly.io/t/heroku-pack-gets-stuck/1741/1 "2021-06-20T17:17:34Z")
Trying to build my Next.js client here and it’s been stuck like this for days. I’m unable to progress past the build phase even after re-creating the app or even changing the pack number. $ fly deploy Deploying beta-client-stg ==\> Validating app configuration → Validating app configuration done Services TCP 80/443 ⇢ 3000 Remote builder fly-builder-lively-mountain-5552 ready ==\> Building image with Buildpacks 20: Pulling from heroku/buildpacks Digest: sha256:65751fe75629f0f84731081e06900cf1875d418f1725c239bf4732c77f83af02 Status: Image is up to date for heroku/buildpacks:20 20: Pulling from heroku/pack Digest: sha256:4d35a4196fbd4b18e6fe4b84029e30374f1a02dec24c258847e90883bd701830 Status: Image is up to date for heroku/pack:20 ---
**Author:** ![kurt](https://sea1.discourse-cdn.com/fly1/user_avatar/community.fly.io/kurt/32/43757_2.png) [@kurt](https://community.fly.io/u/kurt)\ **Post date:** [June 21, 2021, 4:10pm UTC](https://community.fly.io/t/heroku-pack-gets-stuck/1741/2 "2021-06-21T16:10:39Z")
How long does that last? This part of the Heroku’s pack process isn’t very helpful, it takes that builpack and uses it to build a base image. It can take a shocking amount of time and give you no output. For nextjs, you might consider switching to a Dockerfile. It’ll be quicker and less error prone. [Deployment | Next.js](https://nextjs.org/docs/deployment#docker-image)