Ninja fail when a .rc file is added to an executable

Adding a window resource file ".rc" using CMake command

qt_add_executable(target main.cpp ${app_icon_resource_windows}) 

containing the application icon specification, the build command generates the .exe with the desired icon. If I build the project another time ninja returns an error:

ninja: error: FindFirstFileExA(//program files (x86)/windows kits/10/include/10.0.17763.0/um): Impossibile trovare il percorso di rete.
// The latter in EN: Impossible to find network path

Seems that the command{}

FindFirstFileExA()

wrong the path: "//program files ..." vs "c:/program files .."

Removing the ".rc" file

qt_add_executable(target main.cpp #[[${app_icon_resource_windows}]])

the process completes successfully all the times.

The bug can be checked using the Qt example "PhotoSurface".

I attach also a really short example named "appicon".

Building the application twice the bug occurs