[INFO] building with MacPorts

[abey79]

I managed to run this example by installing dependencies using MacPorts instead of pixi,. Here is what I had to do:

Install deps:

sudo port install cmake opencv4 eigen3

When running cmake:

export CMAKE_PREFIX_PATH=/opt/local/libexec/opencv4/cmake/
cmake -DCMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES=/opt/local/include ..

[Wumpf]

let's add this to the readme then!