# Can't rebuild due to AWS SDK gem bump and new AWS Data Integrity Protections

**URL:** https://meta.discourse.org/t/cant-rebuild-due-to-aws-sdk-gem-bump-and-new-aws-data-integrity-protections/354217
**Category:** Self-hosting
**Created:** [February 24, 2025, 5:39pm UTC](https://meta.discourse.org/t/cant-rebuild-due-to-aws-sdk-gem-bump-and-new-aws-data-integrity-protections/354217 "2025-02-24T17:39:21Z")
**Posts on this page:** 1
**Showing post:** 40

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### Author: ![AntiMetaman](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/antimetaman/32/186978_2.png) [@AntiMetaman](https://meta.discourse.org/u/AntiMetaman)
#### Post date: [March 1, 2025, 5:45am UTC](https://meta.discourse.org/t/cant-rebuild-due-to-aws-sdk-gem-bump-and-new-aws-data-integrity-protections/354217/40 "2025-03-01T05:45:26Z")

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You’re right!

Backblaze **does not support** `x-amz-checksum-crc32`, and Discourse’s newer AWS SDK version may have enabled this by default.

so i went into the app:

> ./launcher enter app

and uninstalled the current version of AWS SDK:

> gem uninstall aws-sdk-s3 aws-sdk-core aws-sdk-kms

and installed the one that the backblaze guy said would work:

> gem install aws-sdk-core -v “~\> 3.215.1”  
> gem install aws-sdk-kms -v “~\> 1.96.0”  
> gem install aws-sdk-s3 -v “~\> 1.177.0”

then I rebuilt the app and it worked!

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_[View the full topic](https://meta.discourse.org/t/cant-rebuild-due-to-aws-sdk-gem-bump-and-new-aws-data-integrity-protections/354217)._