Generated by SassMeister.com.

SassMeister-input-HTML.haml

.container
  .wrap
    .box-1
    .box-2
  .cf

SassMeister-input.scss

// ----
// libsass (v3.0)
// ----

$column: golden-ratio(1em, 3) !default !global;
$visual-grid: true;

@import "bourbon/bourbon";
@import "neat/neat";

.container {
  @include outer-container;
  // background: green;
  outline: 1px solid blue;
  min-height: 400px;
}

.box-1 {
  @include span-columns(4);
  outline: 1px solid red;
  height: 40px;
}

SassMeister-output.css

sass_modules/neat/functions/private:69: invalid operands for multiplication

SassMeister-rendered.html

<div class='container'>
  <div class='wrap'>
    <div class='box-1'></div>
    <div class='box-2'></div>
  </div>
  <div class='cf'></div>
</div>