stlink-gui fails to start due to failure to load UI file in source build

[p12tic]

• Operating system: Linux Ubuntu 18.04.
• Stlink tools version: latest git master (3295ab4)
• Stlink commandline tool name: stlink-gui

stlink-gui fails to start after compiling from source. All of the following fail with the same message:

• mkdir build; pushd build; cmake ..; make -j32 all; ./src/tools/gui/stlink-gui; popd
• mkdir build; pushd build; cmake ..; make -j32 all; ./src/tools/gui/stlink-gui-local; popd
• mkdir build; pushd build; cmake ..; make -j32 all; make install DESTDIR=inst; ./install/usr/local/bin/stlink-gui; popd
• cmake .; make -j32 all; ./src/tools/gui/stlink-gui
• cmake .; make -j32 all; ./src/tools/gui/stlink-gui-local

The message is: Failed to load UI file: stlink-gui.ui.

It would be great if this issue is solved somehow. Also, documentation could include a short section about what stlink-gui is and if it's experimental feature, that it doesn't work yet. Thank you!