# Improvements to downloading extensions during build

**Project:** Applications | **Board:** Live | **Votes:** 1
**URL:** https://roadmap.ploi.cloud/projects/3-applications/items/171-improvements-to-downloading-extensions-during-build

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A deploy today failed in the generated Dockerfile's install-php-extensions step: Imagick's compile downloads a PHP-Parser tarball at build time, received an error page instead (gzip: stdin: not in gzip format → make error 1). 

An unchanged redeploy succeeded. 

Would it be possible to have either: 
(a) retry-with-backoff around extension build downloads, 
and/or (b) pre-bake or layer-cache compiled extensions (at the moment every deploy looks like it currently recompiles Imagick from source, which both slows builds and re-exposes each deploy to upstream download flakiness)?

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## Comments

**Zander van der Meer** (2026-09-11T13:56:25+00:00):
We have improved our build flow so this problem will be less of an issue. We'll monitor it for now and move from there. :)

**Steve Parks** (2026-09-11T15:04:59+00:00):
Thanks 👍