QApplication::setFont: Family name is too long

I'm setting a custom font in my application using QApplication::setFont in main():

{{ QFont font("qrc:/fonts/Sansation_Regular.ttf");}}
{{ app.setFont(font);}}

When running this on windows, I get the following error:

fontDefToLOGFONT: Family name 'qrc:/fonts/Sansation_Regular.ttf' is too long.

Linux/Android/iOS have no complaints.