# Having trouble Installing extenssion 

**URL:** <https://discourse.slicer.org/t/having-trouble-installing-extenssion/34904>\
**Category:** Development\
**Created:** [March 15, 2024, 6:26am UTC](https://discourse.slicer.org/t/having-trouble-installing-extenssion/34904 "2024-03-15T06:26:30Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jose-d](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jose-d/32/69652_2.png) [@jose-d](https://discourse.slicer.org/u/jose-d)\
**Post date:** [March 18, 2024, 8:16am UTC](https://discourse.slicer.org/t/having-trouble-installing-extenssion/34904/2 "2024-03-18T08:16:50Z")

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TL/DR: at this moment, I’m now aware about any implicit way how to let users install extensions into _system-provided_ Slicer.

longer answer:

Hi, (I see nobody answered yet your question, so giving my 5c)

first, I’m more Apptainer guy rather than Slicer expert - we’re investigating how to use Slicer properly at our site too.

Did you try to build SlicerRadiomics in `%post` section of apptainer definition file, to have extension _baked in_ apptainer image?

Cleaner way could be to install base slicer, and then, create apptainer image derived from base Slicer image with installed extension(s)…

The reason behind is (it was [explained](https://discourse.slicer.org/t/installing-extension-in-users-folder-in-linux/34805/23) here at this forum recently) that Slicer mixes application itself and user-installed extensions in its “root” directory…

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_[View the full topic](https://discourse.slicer.org/t/having-trouble-installing-extenssion/34904)._