gistfile1.txt

~ $ cat .config/fontconfig/fonts.conf 
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<!-- Set preferred serif, sans serif, and monospace fonts. -->
  <alias>
    <family>serif</family>
    <prefer>
        <family>Source Serif Pro</family>
    </prefer>
  </alias>
  <alias>
    <family>sans-serif</family>
    <prefer>
        <family>Source Sans Pro</family>
    </prefer>
  </alias>
  <alias>
    <family>sans</family>
    <prefer>
        <family>Source Sans Pro</family>
    </prefer>
  </alias>
  <alias>
    <family>monospace</family>
    <prefer><family>Source Code Pro</family></prefer>
  </alias>
</fontconfig>

~ $ fc-cache