Vercel deploy breaks for preview | Convex Community | Page 1

jovial torrent Jul 27, 2025, 4:38 PM

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This week, vercel Preview deployments that were using prod DEPLOY_KEY started to break with:

          This is probably unintentional.

I don't know how to get around this as vercel is doing a preview build that is promoted to production after it's done.

I understand the requirement for pro account with preview builds... but we should be able to choose to use same be for both. or at least mentain the existing featureset.

I saw no announcement in this regard...

Maybe this is connected...

on project: https://dashboard.convex.dev/t/sorin-2a17b/test-automuse-repo/notable-crow-732
I created a DEPLOYMENT_KEY, added it to vercel, but the convex deploy returns:

Running "npx convex deploy --cmd 'npm run build'"
sh: line 1: /vercel/path0/node_modules/.bin/convex: Permission denied

was there any recent change that could causet this on convex side?

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south falconBOT Jul 27, 2025, 4:38 PM

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Thanks for posting in #1088161997662724167.
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jovial torrent Jul 29, 2025, 6:27 PM

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🙄

jovial torrent Jul 29, 2025, 8:08 PM

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For correlation: I so have a opened git issue. https://github.com/get-convex/convex-backend/issues/166

GitHub

Deployment fails on Vercel with: bin/convex: Permission denied · I...

I am running a new project and I want to deploy the FE to Vercel. (did this a few times before) I am on the free tier. I have set the CONVEX_DEPLOY_KEY (did multiple checks...) with the value from ...

obsidian venture Jul 29, 2025, 10:28 PM

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@jovial torrent responded about the GitHub issue there, but re the top issue in this thread: you probably don't want to deploy to prod for preview deploys, right?

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I don't know how to get around this as vercel is doing a preview build that is promoted to production after it's done.
Is this a new workflow in Vercel?

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We might need new instructions if this is the case, e.g. using prod for the functions

jovial torrent Jul 30, 2025, 5:55 AM

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the permission denied was my fault. I committed by mistake the node_modules.

Removed it from Git and after some back and fw, it works again.

I'll investigate the other "preview" related issue, but most likely I also did something wrong over there. Bot projects are PoCs and things move a lot in them.

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in the "permission denied" I am trying to do a super fast path to public builds with Next + Convex + Clerk + Google SSO
I am automating the interactions with clerk and vercel trough nodeJS scripts. that's providers config plus env vars and some react code .

btw: I managed to also create the proper token for convex programatically 🙂

is this path something that you guys may be interested?

obsidian venture Jul 30, 2025, 6:51 AM

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jovial torrent the permission denied was my fault. I committed by mistake the node_modules. R...

I'll investigate the other "preview" related issue, but most likely I also did something wrong over there.
This might be a real thing, for users who don't have convex preview deployments enabled (generally free users, but also just if they're off) but do have Vecel/Netlify/Cloudflare/wahtever preview deployments enabled, when I've done this I've used an if statement in shell to not deploy functions if it's a preview and hardcode the prod backend convex url.

There are only really two approaches here, using your personal dev deployment for the preview or using the production deployment for the preview. Would be worth adding directions at least to https://docs.convex.dev/production/hosting/vercel#preview-deployments

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I am automating the interactions with clerk and vercel trough nodeJS scripts. that's providers config plus env vars and some react code .

btw: I managed to also create the proper token for convex programatically
If you post I bet folks would be interested! I'm not quite sure what this means, like a browser automation setup that signs up for accounts?

jovial torrent Jul 30, 2025, 6:53 AM

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so basically you just skip the convex deploy altogether. corect?

obsidian venture Jul 30, 2025, 6:54 AM

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yeah

jovial torrent Jul 30, 2025, 6:54 AM

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specifically in vercel we can scope the env vars, so we can prep the env upfront for a clean path

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I hope to get some time during the we to work on this and I'll post here the results. maybe it saves someone some time 😄 >> as in: i'll do a sanity check to see if nothing else was changed, and then put in the if thingy

#Vercel deploy breaks for preview