Here's the experiment again with 3.10.1 and 3.11.0a3, and more ls's:


$ python3.10 -V
Python 3.10.1

$ python3.10 -m venv v310

$ ls -al v310/bin
total 72
drwxr-xr-x  12 nedbatchelder  wheel   384 Dec 16 06:42 ./
drwxr-xr-x   6 nedbatchelder  wheel   192 Dec 16 06:42 ../
-rw-r--r--   1 nedbatchelder  wheel  9033 Dec 16 06:42 Activate.ps1
-rw-r--r--   1 nedbatchelder  wheel  1993 Dec 16 06:42 activate
-rw-r--r--   1 nedbatchelder  wheel   919 Dec 16 06:42 activate.csh
-rw-r--r--   1 nedbatchelder  wheel  2061 Dec 16 06:42 activate.fish
-rwxr-xr-x   1 nedbatchelder  wheel   246 Dec 16 06:42 pip*
-rwxr-xr-x   1 nedbatchelder  wheel   246 Dec 16 06:42 pip3*
-rwxr-xr-x   1 nedbatchelder  wheel   246 Dec 16 06:42 pip3.10*
lrwxr-xr-x   1 nedbatchelder  wheel    10 Dec 16 06:42 python@ -> python3.10
lrwxr-xr-x   1 nedbatchelder  wheel    10 Dec 16 06:42 python3@ -> python3.10
lrwxr-xr-x   1 nedbatchelder  wheel    25 Dec 16 06:42 python3.10@ -> /usr/local/bin/python3.10

$ ls -al /usr/local/bin/python3.10
lrwxr-xr-x  1 nedbatchelder  admin  53 Dec 16 06:38 /usr/local/bin/python3.10@ -> /usr/local/pyenv/pyenv/versions/3.10.1/bin/python3.10

$ v310/bin/python -m venv v310-nested

$ v310-nested/bin/python -V
Python 3.10.1

$ ls -al v310-nested/bin
total 72
drwxr-xr-x  12 nedbatchelder  wheel   384 Dec 16 06:43 ./
drwxr-xr-x   6 nedbatchelder  wheel   192 Dec 16 06:43 ../
-rw-r--r--   1 nedbatchelder  wheel  9033 Dec 16 06:43 Activate.ps1
-rw-r--r--   1 nedbatchelder  wheel  2014 Dec 16 06:43 activate
-rw-r--r--   1 nedbatchelder  wheel   940 Dec 16 06:43 activate.csh
-rw-r--r--   1 nedbatchelder  wheel  2082 Dec 16 06:43 activate.fish
-rwxr-xr-x   1 nedbatchelder  wheel   249 Dec 16 06:43 pip*
-rwxr-xr-x   1 nedbatchelder  wheel   249 Dec 16 06:43 pip3*
-rwxr-xr-x   1 nedbatchelder  wheel   249 Dec 16 06:43 pip3.10*
lrwxr-xr-x   1 nedbatchelder  wheel    37 Dec 16 06:43 python@ -> /private/tmp/bpo46028/v310/bin/python
lrwxr-xr-x   1 nedbatchelder  wheel     6 Dec 16 06:43 python3@ -> python
lrwxr-xr-x   1 nedbatchelder  wheel     6 Dec 16 06:43 python3.10@ -> python

$ ls -al /private/tmp/bpo46028/v310/bin/python
lrwxr-xr-x  1 nedbatchelder  wheel  10 Dec 16 06:42 /private/tmp/bpo46028/v310/bin/python@ -> python3.10


$ python3.11 -V
Python 3.11.0a3

$ python3.11 -m venv v311

$ ls -al v311/bin
total 72
drwxr-xr-x  12 nedbatchelder  wheel   384 Dec 16 06:45 ./
drwxr-xr-x   6 nedbatchelder  wheel   192 Dec 16 06:45 ../
-rw-r--r--   1 nedbatchelder  wheel  9033 Dec 16 06:45 Activate.ps1
-rw-r--r--   1 nedbatchelder  wheel  1993 Dec 16 06:45 activate
-rw-r--r--   1 nedbatchelder  wheel   919 Dec 16 06:45 activate.csh
-rw-r--r--   1 nedbatchelder  wheel  2061 Dec 16 06:45 activate.fish
-rwxr-xr-x   1 nedbatchelder  wheel   246 Dec 16 06:45 pip*
-rwxr-xr-x   1 nedbatchelder  wheel   246 Dec 16 06:45 pip3*
-rwxr-xr-x   1 nedbatchelder  wheel   246 Dec 16 06:45 pip3.11*
lrwxr-xr-x   1 nedbatchelder  wheel    10 Dec 16 06:45 python@ -> python3.11
lrwxr-xr-x   1 nedbatchelder  wheel    10 Dec 16 06:45 python3@ -> python3.11
lrwxr-xr-x   1 nedbatchelder  wheel    25 Dec 16 06:45 python3.11@ -> /usr/local/bin/python3.11

$ ls -al /usr/local/bin/python3.11
lrwxr-xr-x  1 nedbatchelder  admin  55 Dec  9 12:23 /usr/local/bin/python3.11@ -> /usr/local/pyenv/pyenv/versions/3.11.0a3/bin/python3.11

$ v311/bin/python -m venv v311-nested
Error: [Errno 2] No such file or directory: '/private/tmp/bpo46028/v311-nested/bin/python'

$ ls -al v311-nested/bin
total 0
drwxr-xr-x  5 nedbatchelder  wheel  160 Dec 16 06:45 ./
drwxr-xr-x  6 nedbatchelder  wheel  192 Dec 16 06:45 ../
lrwxr-xr-x  1 nedbatchelder  wheel   21 Dec 16 06:45 python@ -> /usr/local/bin/python
lrwxr-xr-x  1 nedbatchelder  wheel    6 Dec 16 06:45 python3@ -> python
lrwxr-xr-x  1 nedbatchelder  wheel    6 Dec 16 06:45 python3.11@ -> python

$ ls -al /usr/local/bin/python
ls: /usr/local/bin/python: No such file or directory