homebrew disabled pyyaml, this breaks "make" in OpenROAD-flow-scripts/flow

[stefanottili]

Subject

[Flow] for any util, flow Makefile, or flow script issues.

Describe the bug

MacOS M1. I know: not officially supported, but it worked for the last 4 years.
homebrew "disabled" pyyaml on 2024-10-06.

flow % make
Traceback (most recent call last):
  File "OpenROAD-flow-scripts/flow/scripts/defaults.py", line 4, in <module>
    import yaml
ModuleNotFoundError: No module named 'yaml'
...
make: *** [results/nangate45/gcd/base/1_synth.v] Error 2

flow % brew install pyyaml
==> Downloading https://formulae.brew.sh/api/formula.jws.json
########################################################################################################################################################################### 100.0%
==> Downloading https://formulae.brew.sh/api/cask.jws.json
########################################################################################################################################################################### 100.0%
Error: pyyaml has been disabled because it does not meet homebrew/core's requirements for Python library formulae! It was disabled on 2024-10-06.

Expected Behavior

Any hint on how to install yaml in a different way ?

Environment

MacOS Sequoia, M1, using homebrew

To Reproduce

cd flow
make

Relevant log output

No response

Screenshots

No response

Additional Context

No response

[stefanottili]

It seems that brew alone is not enough any more, one has to set up a "virtual env".

https://discuss.python.org/t/on-macos-14-pip-install-throws-error-externally-managed-environment/50352/4

[maliberty]

No clue but if you get it to work please make a PR.

[oharboe]

ubuntu 24 removed "sudo pip3 install". Could it be that brew did something similiar for the same reasons? ("security" is the usual suspect....)

[stefanottili]

Not security, too many users messed up their os with different versions.
https://github.com/orgs/Homebrew/discussions/5707#discussioncomment-11150840

[oharboe]

Makes sense. Same argument goes for Ubuntu 24, I think.