qt_add_shaders fails to create DEPFILE

Trying to build any shader with qsb through CMake fails when building Qt from dev (started happening a couple of days ago):

qt6_add_shaders(myapp "shaders"
    BATCHABLE
    PRECOMPILE
    OPTIMIZED
    FILES
        shaders/logo.frag
    OUTPUTS
        logo_frag.qsb
)

results in a build failure

[ 95%] Generating .qsb/logo_frag.qsb
Unable to create DEPFILE: '.../build/build-myapp-Desktop_6_8_0_kdesrc_build-Debug/src/app/.qsb/logo_frag.qsb.d'

Also reproducible with a more complex project like KDE’s Kirigami framework.

Seems to be caused by 559fbc4f8166cf1e1a1a953fb2f40c1194c76538 “Add depfile support to qsb”