Install libmypaint-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libmypaint-dev
brush library for mypaint - development files
MyPaint is a pressure- and tilt-sensitive painting program which works well with Wacom graphics tablets and other similar devices. It comes with a large brush collection including charcoal and ink to emulate real media, but the highly configurable brush engine allows you to experiment with your own brushes and with not-quite-natural painting. . This package contains the development files.