Linking a Qt(5) application does not work on fedora with mingw

I am trying to set up cross compilation builds for windows on my fedora system.

The compile itself works now (I had to tweak a setting manually, will open a seperate issue about that) but linking fails. It seems to link against a "/usr/x86_64-w64-mingw32/sys-root/mingw/lib/libqtmain.a" which is called /usr/x86_64-w64-mingw32/sys-root/mingw/lib/libqt5main.a here.

The version of qbs was: 0855bb3d44675084c92d956e5059dc58e65714a7

I am attaching the complete build log and the commands I use to setup the build environment.