yf> Would keeping PYTHON_PREFIX but changing its default to the "classical" value be a working solution for this ?
Yes, I think we should. And I think I should have been smart enough to realize that changing the default behavior was too risky in the first place. Apologies for that. My thought now is to add yet one more option, like --python-prefix-from-python, to get the new 1.16.4 behavior of using the "computed" sys.* values. Else go back to the previous $prefix-based behavior. Does that sound sensible? A better name for the option? Joshua (or anyone), would you be willing to work on something like by any chance? Would be greatly, greatly, appreciated. I am way overcommitted right now (like all of us, I know ...). please keep the --with-python_prefix Definitely. --thanks, karl.