Although kdesrc-build supports building Qt5 just like the KDE Frameworks, I prefer to use the prebuilt Qt binaries from for testing against alpha and beta releases. This saves me a lot of time on my machine, which is not powerful enough to compile the full Qt in a reasonable time.

This guide assumes that you already installed Qt from

To reproduce my setup, an additional step is required compared to a kdesrc-build setup that uses the system Qt, nevertheless you start as usual, by cloning kdesrc-build itself:

git clone

Since kdesrc-build should be available anywhere on the system, not just in its own directory, we add it to the PATH variable by appending export PATH=~/kde/src/kdesrc-build:$PATH to your .profile file. Please remember to adapt the path according to where you cloned kdesrc-build to.

echo "export PATH=~/kde/src/kdesrc-build:$PATH" >> ~/.profile
source ~/.profile

Next, the initial setup needs to be performed:

kdesrc-build --initial-setup

This step created all the required configuration files, which now need slight adaptions in order to work with the Qt we downloaded from in the beginning.

Edit ~/.kdesrc-buildrc, and replace the path to Qt qtdir with the path you installed Qt to. The line should then look similar to this:

    qtdir  ~/.local/Qt/5.13.0/gcc_64 # Where to find Qt5

Now as a final step we need to prevent kdesrc-build from trying to build its own Qt, which can be done by commenting one include line: include /home/jbb/kde/kdesrc-build/qt5-build-include, so it looks like #include /home/jbb/kde/kdesrc-build/qt5-build-include.

This should be it! Have fun compiling up to date KDE software using an up to date Qt without compiling Qt for hours :)

kdesrc-build kirigami --include-dependencies

To activate your newly created environment, you can use

source ~/.config/