# Which git branch/tag do I need for building my own APOC lib for version 4.4.11

**URL:** <https://community.neo4j.com/t/which-git-branch-tag-do-i-need-for-building-my-own-apoc-lib-for-version-4-4-11/59276>\
**Category:** Neo4j Graph Platform\
**Tags:** migrated\
**Created:** [October 19, 2022, 10:06am UTC](https://community.neo4j.com/t/which-git-branch-tag-do-i-need-for-building-my-own-apoc-lib-for-version-4-4-11/59276 "2022-10-19T10:06:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ThomasVarias](https://avatars.discourse-cdn.com/v4/letter/t/c0e974/32.png) [@ThomasVarias](https://community.neo4j.com/u/ThomasVarias)\
**Post date:** [October 19, 2022, 10:06am UTC](https://community.neo4j.com/t/which-git-branch-tag-do-i-need-for-building-my-own-apoc-lib-for-version-4-4-11/59276/1 "2022-10-19T10:06:38Z")

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Hi

I installed Neo4j version 4.4.11 and when I build the latest version of APOC from the code (Git branch 4.4) I get the following error:

```auto
Caused by: org.neo4j.kernel.extension.FailedToBuildExtensionException: 
Failed to build kernel extension Extension:JdbcRegistererInitFactory[JdbcDriverRegisterer]
because it is compiled with a reference to a class, method, or field, that is not in 
the class path: 'apoc/ApocConfig'. The most common cause of this problem, is that 
Neo4j has been upgraded without also upgrading allinstalled extensions, such as 
APOC. Make sure that all of your extensions are build against your specific 
version of Neo4j.

```

I tried various combinations, but no luck. Is there some kind of trick I am missing that is needed to run my own verson of APOC?

Many thanks in advance,

Thomas

---

<div class="post-metadata">

**Author:** ![ThomasVarias](https://avatars.discourse-cdn.com/v4/letter/t/c0e974/32.png) [@ThomasVarias](https://community.neo4j.com/u/ThomasVarias)\
**Post date:** [October 19, 2022, 12:36pm UTC](https://community.neo4j.com/t/which-git-branch-tag-do-i-need-for-building-my-own-apoc-lib-for-version-4-4-11/59276/2 "2022-10-19T12:36:55Z")

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I did a checkout like this git checkout tags/4.4.0.9 and if I build that I can start Neo4j 4.4.11 successfully.