How to enforce a particular Python version during port build

[Joshua Root]

On 2019-9-1 10:39 , Blair Zajac wrote:
> 
> I’m not convinced that build.env is honored all the time.

There is certainly a bug where the code that parses *.env will silently
stop as soon as it hits something it can't parse, which means that
variables that are present in the option might not end up actually set
in the environment in that case.

In master/2.6 the code has been rewritten and will print a warning about
the invalid entry before continuing to process the remaining valid ones.

- Josh