Как изменить шрифт верхней панели в Gnome 3.16.2

#!/bin/sh
RES="/usr/share/gnome-shell/gnome-shell-theme.gresource"
TARGET="$HOME/.local/share/themes/Adwaita-Fira/gnome-shell"

rm -rf "$TARGET"
mkdir -p "$TARGET"

for x in $(gresource list "$RES")
do
    gresource extract "$RES" "$x" > "$TARGET/$(basename "$x")"
done

find $TARGET -name "*.css" | xargs sed -i 's/Cantarell/"Fira Sans", Cantarell/g'
find $TARGET -name "*.css" | xargs sed -i 's/font-weight: bold;/font-weight: 500;/g'