Can't install pipreqs

While attempting to install pipreqs via:
```
pip install pipreqs
```

Getting the following error:
```
Collecting pipreqs
Obtaining dependency information for pipreqs from https://files.pythonhosted.org/packages/36/38/cc1343c3a63655e18328e51e00c6e6851be648f1b8babffc5131f1b9f226/pipreqs-0.5.0-py3-none-any.whl.metadata
Using cached pipreqs-0.5.0-py3-none-any.whl.metadata (7.9 kB)
Collecting docopt==0.6.2 (from pipreqs)
Using cached docopt-0.6.2.tar.gz (25 kB)
Preparing metadata (setup.py) ... error
error: subprocess-exited-with-error

× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [1 lines of output]
ERROR: Can not execute `setup.py` since setuptools is not available in the build environment.
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
```
Python 3.11.5

Start by reproducing `pip install pipreqs` on Python 3.11.5 and inspect the dependency path through `docopt==0.6.2`. Use the reported `setup.py` and missing-setuptools error as the starting point; done means pipreqs installs without the metadata-generation failure.

Written by the indexing model from the issue text.