# Error in install extensions

**URL:** <https://discourse.slicer.org/t/error-in-install-extensions/866>\
**Category:** Development\
**Created:** [August 14, 2017, 12:09pm UTC](https://discourse.slicer.org/t/error-in-install-extensions/866 "2017-08-14T12:09:51Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [August 14, 2017, 12:12pm UTC](https://discourse.slicer.org/t/error-in-install-extensions/866/2 "2017-08-14T12:12:35Z")

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Have you build Slicer yourself? If yes, and you need to use Slicer’s appstore for getting extensions, then you must use exactly the same build settings as the Slicer factory machines (most importantly, use SVN repository and a version for that factory machines created extensions).

Note that today there was an error with extension builds on factory machines - see [No extensions for latest nightly](https://discourse.slicer.org/t/no-extensions-for-latest-nightly/865)

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_[View the full topic](https://discourse.slicer.org/t/error-in-install-extensions/866)._