Generated by SassMeister.com.

input.scss

// ----
// Xyz (v4.5.6)
// ----

$red: red; 

foo {
  color: $red;
}

markup.html

h1 foos

markup.md

foo

markup.pug

h1 foos

output.css

.box{font-size:24px;-webkit-user-select: none;-moz-user-select: none;-ms-user-select: none;user-select: none;}

/* Realigned Western Sahara */

result.html

<h1>foos</h1>

settings.json

{
  "sass": {
    "compiler": "libsass/3.5.2",
    "extensions": {
      "Xyz": "4.5.6"
    },
    "syntax": "SCSS",
    "outputStyle": "expanded"
  }
}