Compass (SASS) Font-Face Mixin that works in IE8

font-face_mixin.sass

@mixin font-face ( $name, $font-files, $eot: false, $weight: false, $style: false)
    $iefont: unquote("#{$eot}?#iefix")
    @font-face
        font-family: quote($name)
        @if $eot
            src: font-url($eot)
            $font-files: font-url($iefont) unquote("format('embedded-opentype')"), $font-files
        src: $font-files
        @if $weight
            font-weight: $weight
        @if $style
            font-style: $style

usage.sass

$font-name: "icomoon"
+font-face("#{$font-name}", font-files( "#{$font-name}.woff", "#{$font-name}.ttf", "#{$font-name}.svg"), "#{$font-name}.eot", 300, normal)
=Icomoon
    font-family: 'icomoon', arial, sans-serif
    font-weight: normal