Speckle.Material.Icons.Avalonia/Material.Icons.Avalonia/App.xaml

<Styles xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="Material.Icons.Avalonia.App">
    <StyleInclude Source="avares://Material.Icons.Avalonia/MaterialIcon.xaml" />
</Styles>