Creating a local socket in a custom location with Qt

Question

I'm using QLocalServer to create a local socket so that other processes can connect to my Qt application. My problem is that Qt seems hellbent on creating the socket file in /tmp/, but I would prefer to follow XDG guidelines and use the XDG_RUNTIME_DIR environment variable to determine the correct user-specific socket location instead.

If I use:

QLocalServer socketServer;
socketServer.setSocketOptions(QLocalServer::UserAccessOption);
socketServer.listen("appname.socket"); //creates socket file, returns true.

then the socket is created in /tmp/, but If I attempt to specify an absolute or relative path instead then Qt doesn't seem to bother creating the socket at all.

QLocalServer socketServer;
socketServer.setSocketOptions(QLocalServer::UserAccessOption);
socketServer.listen("/tmp/appname.socket"); //returns false, does not create socket.

Edit: on closer inspection, the setSocketOptions(QLocalServer::UserAccessOption) -- which sets permissions for the socket file -- is what is preventing me from specifying socket paths. Commenting out this line removes the restriction. But surely this isn't how Qt is expected to behave?