luma.led_matrix errors when building from

I have been upgrading the OS on some of my CrowPis so that I can run CircuitPython. I followed the setup instructions here:, including git clone

All the drivers compile, except the one in luma.led_matrix. I get lots of warnings, but errors from /usr/bin/ld that say something like: '...multiple definitions of 'brightness' ... first defined here.' 'brightness' is only an example. Can you help me out to compile luma.led_matrix?

I am using Raspbian GNU/Linux 11 (bullseye) and uname -r says '5.15.32-v71+'

Thank you.


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