Cmake fails on steamdeck (arch based)

[liberavia]

Describe the bug

While running cmake .. -DUSE_PLASMAPKG=ON on the steamdeck (after installing arch dependencies) the following
CMakeOutput.log

System Information

• Kde: 5.23.5
• Qt: 5.15.2
• OS: steamos

deck@steamdeck 
-------------- 
OS: SteamOS Holo x86_64 
Host: Jupiter 1 
Kernel: 5.13.0-valve15-1-neptune-02197-gf6ec7ad3762a 
Packages: 1008 (pacman), 75 (flatpak) 
Shell: bash 5.1.16 
Resolution: 1920x1080 
DE: Plasma 5.23.5 
WM: KWin 
Theme: Vapor [Plasma], Breeze [GTK3] 
Icons: [Plasma], breeze-dark [GTK2/3] 
Terminal: yakuake 
CPU: AMD Custom APU 0405 (8) @ 2.800GHz 
GPU: AMD ATI 04:00.0 VanGogh 
Memory: 4909MiB / 14838MiB 

Additional context

(1)(deck@steamdeck build)$ cmake .. -DUSE_PLASMAPKG=ON
CMake Error at /usr/lib64/cmake/Qt5Core/Qt5CoreConfig.cmake:26 (message):
  The imported target "Qt5::Core" references the file

     "/usr/include/qt/QtCore"

  but this file does not exist.  Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "/usr/lib64/cmake/Qt5Core/Qt5CoreConfig.cmake"

  but not all the files it references.

Call Stack (most recent call first):
  /usr/lib64/cmake/Qt5Core/Qt5CoreConfig.cmake:73 (_qt5_Core_check_file_exists)
  /usr/share/ECM/modules/ECMQueryQmake.cmake:2 (find_package)
  /usr/share/ECM/kde-modules/KDEInstallDirs5.cmake:234 (include)
  /usr/share/ECM/kde-modules/KDEInstallDirs.cmake:15 (include)
  CMakeLists.txt:30 (include)


-- Configuring incomplete, errors occurred!

[catsout]

#177