____      _   _   _                ____ ___ __  __ ____
  / ___| ___| |_| |_(_)_ __   __ _   / ___|_ _|  \/  |  _ \
 | |  _ / _ \ __| __| | '_ \ / _` | | |  _ | || |\/| | |_) |
 | |_| |  __/ |_| |_| | | | | (_| | | |_| || || |  | |  __/
  \____|\___|\__|\__|_|_| |_|\__, |  \____|___|_|  |_|_|
                             |___/
                  _   __  __       ____       _       _
   __ _ _ __   __| | |  \/  |_   _|  _ \ __ _(_)_ __ | |_
  / _` | '_ \ / _` | | |\/| | | | | |_) / _` | | '_ \| __|
 | (_| | | | | (_| | | |  | | |_| |  __/ (_| | | | | | |_
  \__,_|_| |_|\__,_| |_|  |_|\__, |_|   \__,_|_|_| |_|\__|
                ____         |___/   _     _
   ___  _ __   |  _ \ __ _ ___ _ __ | |__ (_) __ _ _ __
  / _ \| '_ \  | |_) / _` / __| '_ \| '_ \| |/ _` | '_ \
 | (_) | | | | |  _ < (_| \__ \ |_) | |_) | | (_| | | | |
  \___/|_| |_| |_| \_\__,_|___/ .__/|_.__/|_|\__,_|_| |_|
 ( | ) __ ) _   _ ___| |_ ___ |_|_( | )
  V V|  _ \| | | / __| __/ _ \ '__|V V
     | |_) | |_| \__ \ ||  __/ |      by TheOuterLinux (above the line)
     |____/ \__,_|___/\__\___|_|      https://theouterlinux.gitlab.io


Last updated: 2021/09/21

Because of package version issues, it is currently impossible, to have
both GIMP and MyPaint installed in Raspbian "Buster"; hopefully this
will help someone in the meantime...

IMPORTANT NOTE!: If you are using python 3.x, make sure to replace
                 anything mentioning 'python' with 'python3' except
                 in the case of 'python-gi-dev' and 'python' during
                 the 'sudo apt install...' process. In other words,
                 'sudo python setup.py demo' would become
                 'sudo python3 setup.py demo'.

The following below the line was retreived from: 
https://www.raspberrypi.org/forums/viewtopic.php?t=284213

------------------------------------------------------------------------

Building MyPaint : https://github.com/mypaint/mypaint#buildtestinstall

sudo apt update
sudo apt install -y build-essential
sudo apt install -y libjson-c-dev libgirepository1.0-dev libglib2.0-dev
sudo apt install -y python autotools-dev intltool gettext libtool

cd
mkdir mypaint
cd mypaint/
git clone https://github.com/mypaint/libmypaint.git
cd libmypaint/
./autogen.sh
./configure
sudo make install
sudo ldconfig

cd ~/mypaint
git clone https://github.com/mypaint/mypaint-brushes.git
cd mypaint-brushes/
./autogen.sh
./configure
make
sudo make install

sudo apt install python-gi-dev
sudo apt install liblcms2-dev
sudo apt install libgtk-3-dev
sudo apt install swig

cd ~/mypaint
git clone https://github.com/mypaint/mypaint.git
cd mypaint
python setup.py demo
sudo python setup.py managed_install