Comment 4 for bug 76653

After you globally configured your fontconfig to have /etc/fonts/conf.d/70-no-bitmaps.conf
add this to your ~/.fonts.conf

<!-- To disable bitmap fonts whereever possible
     put the following rule in your personal ~/.fonts.conf file: -->
<match target="pattern">
    <edit name="prefer_bitmap">
     <bool>false</bool>
    </edit>
</match>

It works for me on Gentoo.