How to specify a Github fork of Teensy 4 core library in PlatformIO

[mzero]

I asked about my particular case, and got an answer that worked just great. Pretty sure same idea will work for you:

Fork a framework?

I’m happily building things for my Adafruit Feather M4, using the standard PlatformIO packages: [env] platform = atmelsam board = adafruit_feather_m4 framework = arduino build_flags = -D USE_TINYUSB -D SH110X_NO_SPLASH lib_deps = adafruit/Adafruit SH110X@^2.1.14 pharap/FixedPoints@^1.1.2 I’d like to do some development work on Adafruit’s core for SAMD, by forking their repo locally and tinkering with the code. (I have improvements to wiring.cpp and reset.cpp…) I though I could add somet…