Caveats #

Packages can not be run from the workspace root. You need run them from their respective directory. This is due to the fan-controller package only compiling with the thumbv6m-none-eabi target which is specified in .config.toml which will only be read by cargo when running from the that package directory.
There is currently an unstable per-package-target cargo feature in the works on GitHub, but it does not support the runner specified which is also required to run on a connected RP2040 pico.