// Generate sprites
@import 'sprites';

[class^=sprite] {
  display: inline-block;
  vertical-align: middle;

  &:hover {
    @extend .sprite--active;
  }
}

@include sprites($spritesheet-sprites);

// Generate sprites
@import 'sprites';

[class^=sprite] {
  display: inline-block;
  vertical-align: middle;

  &:hover {
    @extend .sprite--active !optional;
  }
}

@include sprites($spritesheet-sprites);

Add !optional flag to sprite hover selector
Add !optional flag to sprite hover selector
