Anton Patrushev <[email protected]> added the comment:
I found when this "feature" was implemented:
gitff2d9b71547d95566416fa968872910ca9c4adb1
Part of commit message:
```
in command-line options, and in two phases at that: first, we expand
'install_base' and 'install_platbase', and then the other 'install_*'
options. This lets us do tricky stuff like
install --prefix='/tmp$sys_prefix'
...oooh, neat.
```
So this was intentional change in distutils.
The only suggestion I have to fix this issue without break something in the
wild is to suppress exception in Lib/distutils/util.py:189 and leave variable
without available substitutions as it is. To be on safe side this can be even
optional and disabled by default.
I am newcomer so some guidance will be helpful.
----------
nosy: +Anton Patrushev
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<https://bugs.python.org/issue33193>
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