Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// Include Media (v1.1.2)
// ----

@import "include-media";

// new media mixin, supporting simple lists as parameters
@mixin media($conditions...) {
  $conditions_parsed: ();

  @for $i from 1 through length($conditions) {
    
    @if type_of(nth($conditions, $i )) == 'list' {
      @for $li from 1 through length(nth($conditions, $i )) {
        $conditions_parsed: append($conditions_parsed, parse-expression(nth(nth($conditions, $i), $li)));
      }
    }
    @else {
      $conditions_parsed: append($conditions_parsed, parse-expression(nth($conditions, $i)));
    }
  }

  $branches: get-query-branches($conditions_parsed);
  $query: '';

  @each $branch in $branches {
    @if (str-length($query) != 0) {
      $query: $query + ', ';
    }

    $query: $query + $branch;
  }

  @media #{$query} {
    @content;
  }
}

// TEST CASE

$lap: ">phone", "<=tablet";

.selector2 {
    color: #bada55;

    @include media($lap, "retina2x") {
        color: #b000b5;
    }
}

SassMeister-output.css

.selector2 {
  color: #bada55;
}
@media (min-width: 321px) and (max-width: 768px) and (-webkit-min-device-pixel-ratio: 2), (min-width: 321px) and (max-width: 768px) and (min-resolution: 192dpi) {
  .selector2 {
    color: #b000b5;
  }
}