.envrc not creating and activating Python venv virtual environment

[penyuan]

Hello,

I've been using direnv .envrc and .tool-versions files in project directories to automatically create and load Python venv virtual environments. I do this by installing direnv and Python with asdf (via the asdf-direnv and asdf-python plugins). I achieved this by following the venv instructions in this direnv Python wiki page. All of this is done through the fish shell. This has worked well for me, until now...

I just installed asdf, direnv, and my desired Python 3.12.1 on a new Rocky Linux 9.3 system with fish shell. I did the following steps, which are identical to how I set things up on previous systems:

1. Install my desired Python 3.12.1 with asdf.
2. Install direnv 2.32.3 with asdf.
3. Run asdf direnv setup --shell fish --version 2.32.3
4. Navigate to my project directory in fish shell.
5. Create .tool-versions with one line: python 3.12.1
6. Create .envrc with one line: layout python
7. Run the command direnv allow

In the past, I would see that direnv has automatically created the .direnv sub-directory and set up a Python venv virtual environment that is loaded every time I navigate to this folder in fish shell.

However, this time nothing happened.

Can someone please advise on what's wrong or how to troubleshoot this problem? Thanks!