Setup does not work on Mac: sql.h file not found

[PatTutor]

I'm following the tutorial at https://github.com/FMCorz/mdk#user-content-for-development

Here's what I get:

moodle-sdk % python setup.py develop --user
running develop
running egg_info
creating moodle_sdk.egg-info
writing requirements to moodle_sdk.egg-info/requires.txt
writing moodle_sdk.egg-info/PKG-INFO
writing top-level names to moodle_sdk.egg-info/top_level.txt
writing dependency_links to moodle_sdk.egg-info/dependency_links.txt
writing entry points to moodle_sdk.egg-info/entry_points.txt
writing manifest file 'moodle_sdk.egg-info/SOURCES.txt'
reading manifest file 'moodle_sdk.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'moodle_sdk.egg-info/SOURCES.txt'
running build_ext
Creating /Users/stnp/Library/Python/2.7/lib/python/site-packages/moodle-sdk.egg-link (link to .)
Adding moodle-sdk 2.0.4 to easy-install.pth file
Installing mdk script to /Users/stnp/Library/Python/2.7/bin

Installed /Users/stnp/dev/moodle-sdk
Processing dependencies for moodle-sdk==2.0.4
Searching for pyodbc>=4.0.21
Reading https://pypi.org/simple/pyodbc/
Downloading https://files.pythonhosted.org/packages/d1/21/755f5fa373d01d1803d992c7611799dc4e9fcbb5db7d0852990d6ab3c9ad/pyodbc-4.0.32.tar.gz#sha256=9be5f0c3590655e1968488410fe3528bb8023d527e7ccec1f663d64245071a6b
Best match: pyodbc 4.0.32
Processing pyodbc-4.0.32.tar.gz
Writing /var/folders/vr/wc2z52f942g1jtmzz1pp96280000gq/T/easy_install-q_FCvl/pyodbc-4.0.32/setup.cfg
Running pyodbc-4.0.32/setup.py -q bdist_egg --dist-dir /var/folders/vr/wc2z52f942g1jtmzz1pp96280000gq/T/easy_install-q_FCvl/pyodbc-4.0.32/egg-dist-tmp-nYqRSw
In file included from src/buffer.cpp:12:
src/pyodbc.h:56:10: fatal error: 'sql.h' file not found
#include <sql.h>
         ^~~~~~~
1 error generated.
error: Setup script exited with error: command 'cc' failed with exit status 1
moodle-sdk % 

Using macOs 11.6.1