flocon/dot_config/fontconfig/fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
	<alias>
		<family>sans-serif</family>
		<prefer>
			<family>Noto Sans</family>
			<family>Noto Color Emoji</family>
			<family>Noto Emoji</family>
			<family>DejaVu Sans</family>
		</prefer> 
	</alias>
	<alias>
		<family>serif</family>
		<prefer>
			<family>Noto Serif</family>
			<family>Noto Color Emoji</family>
			<family>Noto Emoji</family>
			<family>DejaVu Serif</family>
		</prefer>
	</alias>
<alias>
	<family>monospace</family>
	<prefer>
		<family>Operator Mono</family>
		<family>Noto Mono</family>
		<family>Noto Color Emoji</family>
		<family>Noto Emoji</family>
	</prefer>
</alias>
 <!-- Fixup Operator Mono weights -->
 <match target="scan">
   <test name="family">
     <string>Operator Mono Bold</string>
   </test>
   <edit name="weight">
     <const>bold</const>
   </edit>
 </match>
 <match target="scan">
   <test name="family">
     <string>Operator Mono Book</string>
   </test>
   <edit name="weight">
     <const>book</const>
   </edit>
 </match>
 <match target="scan">
   <test name="family">
     <string>Operator Mono XLight</string>
   </test>
   <edit name="weight">
     <const>extralight</const>
   </edit>
 </match>
</fontconfig>