On Monday, 7 April 2025 at 09:17:18 UTC-7 David Lowry-Duda wrote:

Maybe I'm misinterpreting, but we already have --with-system-python3 that 
defaults to "yes", right? Is this different than the proposed 
--install_own_python option? 

I would expect that the flag *prefers* a system python that meets the set 
version requirements, but will proceed to try and build python3 if it 
cannot find a suitable version. The proposed change in behaviour would be 
to default to raising an error and halting the build attempt because in 
most situations, the absence of a suitable python3 is indicative of a 
deficient building environment anyway.

Apparently users in that situations are generally better off going with 
conda to ensure the prerequisites are in place. That's not unreasonable, 
given that conda was developed exactly to provide people with a scientific 
computing  environment.  I can see why the architecture of the MacOS app is 
not well-suited for that approach, given that it should be self-contained.

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