# Opening ALPACA for the first time and stuck on "Installing ALPACA Python Packages...."

**URL:** <https://discourse.slicer.org/t/opening-alpaca-for-the-first-time-and-stuck-on-installing-alpaca-python-packages/43415>\
**Category:** Support\
**Tags:** slicermorph, alpaca\
**Created:** [June 18, 2025, 7:13pm UTC](https://discourse.slicer.org/t/opening-alpaca-for-the-first-time-and-stuck-on-installing-alpaca-python-packages/43415 "2025-06-18T19:13:20Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [June 19, 2025, 4:06pm UTC](https://discourse.slicer.org/t/opening-alpaca-for-the-first-time-and-stuck-on-installing-alpaca-python-packages/43415/3 "2025-06-19T16:06:56Z")

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@jsguerra If you are tracking the github issue, until the fix is integrated, the workaround is to manually install the numpy. These steps worked for me:

1. in Python console type `pip\_install(“numpy==2.00”)’
2. Restart Slicer
3. Switch to ALPACA

It should continue installing remaining packages (pandas) and then ALPACA should be working.

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_[View the full topic](https://discourse.slicer.org/t/opening-alpaca-for-the-first-time-and-stuck-on-installing-alpaca-python-packages/43415)._