=== build plasma-nano ===
As I learned from AIIX the mycroft-gui is meant to be run on top of plasma nano.
This is my log of building plasma-nano
==== first attempt ====
* cd ~/kde/src/kdesrc-build
* export CMAKE_PREFIX_PATH=/opt/Qt5.12:/home/pi/kde/usr 
* export PKG_CONFIG_PATH=/opt/Qt5.12:$PKG_CONFIG_PATH
* export CFLAGS="-I/home/pi/kde/usr/include"
* export LDFLAGS="-L/home/pi/kde/usr/lib"
* export QT_SELECT=5 
* ./kdesrc-build --src-only plasma-nano
* ./kdesrc-build --no-src plasma-nano