fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
  <match target="pattern">
    <!-- Get rid of that default 12pt font shit FcDefaultSubstitute does -->
    <!-- holy fuck this is so obscure -->
    <!--
         So get this: when we get an empty property, i.e. it being missing from
         the pattern in this case, qual=all will unconditionally succeed without
         actually checking the condition. There doesn't seem to be a way to
         check if a property is empty explicitly so in case the property does
         have a value already I don't want to override whatever comes in. So I
         just match against the thing I substitute with which will have no
         effect in the non-empty case :)
    -->
    <test qual="all" name="size" compare="eq"><double>7.5</double></test>
    <edit name="size" mode="assign" binding="weak"><double>7.5</double></edit>
  </match>
</fontconfig>