# Installing extension inside a Dockerfile

**URL:** <https://discourse.slicer.org/t/installing-extension-inside-a-dockerfile/13925>\
**Category:** Support\
**Created:** [October 7, 2020, 5:17pm UTC](https://discourse.slicer.org/t/installing-extension-inside-a-dockerfile/13925 "2020-10-07T17:17:40Z")\
**Posts on this page:** 1\
**Showing post:** 12

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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:** [December 30, 2021, 5:58pm UTC](https://discourse.slicer.org/t/installing-extension-inside-a-dockerfile/13925/12 "2021-12-30T17:58:08Z")

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> [@ROSENty](#):
>
> Cause docker container is non-GUI

Showing GUI or not is your choice, but you need to set up a display server to run the full application. It does not mean that you need to display a GUI at the host.

The slicer-notebook docker image that I linked above installs SlicerJupyter. Replace that by SlicerElastix and you are good.

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_[View the full topic](https://discourse.slicer.org/t/installing-extension-inside-a-dockerfile/13925)._