anchor.diff:        XMLSimple
         XMLWriter
       ]}:"$out/share/perl5 \
  -    --prefix XDG_DATA_DIRS : "$out/share" \
  +    --prefix XDG_DATA_DIRS : "$out/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH" \
       --set TEXINPUTS ":.:$out/tex/latex"
     '';
   
  
positive.code:     graphicsmagick
      gsettings-desktop-schemas
      gtk3
      libnotify
      librsvg
      libxslt
  
negative.code:     "LANG_GTKSOURCEVIEW_DIR=/share/gtksourceview-4/language-specs"
      # Pretend to be redhat so `install` doesn't try to chown/chgrp.
      "SYSTEM_TYPE=rpm"
      "GCC=${stdenv.cc.targetPrefix}cc"
      "GCC_PP=${stdenv.cc.targetPrefix}c++"
    ];
  
    preFixup = ''
  