# Cannot connect to remote builder

**URL:** <https://community.fly.io/t/cannot-connect-to-remote-builder/2087>\
**Category:** Build debugging\
**Created:** [August 3, 2021, 7:11pm UTC](https://community.fly.io/t/cannot-connect-to-remote-builder/2087 "2021-08-03T19:11:28Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![can](https://sea1.discourse-cdn.com/fly1/user_avatar/community.fly.io/can/32/7630_2.png) [@can](https://community.fly.io/u/can)\
**Post date:** [August 4, 2021, 3:36am UTC](https://community.fly.io/t/cannot-connect-to-remote-builder/2087/5 "2021-08-04T03:36:00Z")

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I don’t have access to a Linux machine right now but this is intriguing. Sorry if me trying to debug this is annoying on the docs.

> [@Remote builder connection failing](https://community.fly.io/t/remote-builder-connection-failing/1924):
>
> Since yesterday, I’ve been unable to deploy with a remote builder (using the Paketo Go buildpack). It worked at first, in the morning yesterday (European time), but I now get: Deploying lingering-sun-7724 ==\> Validating app configuration --\> Validating app configuration done WARN Remote builder did not start on time. Check remote builder logs with `flyctl logs -a fly-builder-quiet-sun-4345` Error remote builder app unavailable The builder instance does start (it’s the “connecting” that fails/…

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_[View the full topic](https://community.fly.io/t/cannot-connect-to-remote-builder/2087)._