Setting the default style of a font in fonts.conf

I'm trying to set the default style of a font in fonts.conf because for whatever reason the bold version always gets matched:

$ fc-match monospace
LigaOperatorMonoSSm-Bold.otf: "Liga Operator Mono SSm" "Bold"

This is my fonts.conf:

true

  
    Liga Operator Mono SSm
    Medium
  

  
    serif
    Circular Std
  
  
    sans-serif
    Circular Std
  
  
    sans
    Circular Std
  
  
    monospace
    Liga Operator Mono SSm
  
  
    terminal
    Liga Operator Mono SSm

As you can see, I've tried to set the default width to Medium but it unfortunately does not work. These are the available styles:

/usr/share/fonts/OTF/LigaOperatorMonoSSm-LightItalic.otf: Liga Operator Mono SSm:style=Light Italic,Italic
/usr/share/fonts/OTF/LigaOperatorMonoSSm-MediumItalic.otf: Liga Operator Mono SSm:style=Medium Italic,Italic
/usr/share/fonts/OTF/LigaOperatorMonoSSm-Medium.otf: Liga Operator Mono SSm:style=Medium,Regular
/usr/share/fonts/OTF/LigaOperatorMonoSSm-BoldItalic.otf: Liga Operator Mono SSm:style=Bold Italic,Italic
/usr/share/fonts/OTF/LigaOperatorMonoSSm-Book.otf: Liga Operator Mono SSm:style=Book,Regular
/usr/share/fonts/OTF/LigaOperatorMonoSSm-Bold.otf: Liga Operator Mono SSm:style=Bold,Regular
/usr/share/fonts/OTF/LigaOperatorMonoSSm-BookItalic.otf: Liga Operator Mono SSm:style=Book Italic,Italic
/usr/share/fonts/OTF/LigaOperatorMonoSSm-Light.otf: Liga Operator Mono SSm:style=Light,Regular

Does anyone see where the mistake is? Thanks!