Building external C modules

[potato]

I've followed the example in the docs to the letter, AFAICS
https://docs.micropython.org/en/latest/ ... dules.html

but when I

make USER_C_MODULES=/home/potato/active_dev/micropython_module/example CFLAGS_EXTRA=-DMODULE_EXAMPLE_ENABLED=1 all

my custom module directory does not get touched/built at all (and as would be expected attempting to 'import example' on the REPL fails)
Am I missing something obvious? Is there a key step in the docs missing or have the flags somehow changed?

Many thanks
P.

[jimmo]

Maybe add V=1 to make for more output.

Or if you can push your code to github or something.