css - Compass: Syntax error: Undefined mixin 'user-select' -

i follow error when trying use mixin 'user-select'. i'm using version 0.12.2 i'm pretty sure supports user-select compass. why can't use mixin?

error

 syntax error: undefined mixin \'user-select\' 

includes

// css3     @import "compass/css3";     @import "partials/deposit"; 

call

//file: partials/_deposit.scss @include user-select(none); 

so why can't use mixin?

from @import "compass/css3/", list of imported things:

• appearance – specify css3 appearance property.
• background clip – specify background clip browsers.
• background origin – specify background origin browsers.
• background size – specify background size browsers.
• border radius – specify border radius browsers.
• box – module provides mixins pertain css3 flexible box.
• box shadow – specify box shadow browsers.
• box sizing – specify box sizing browsers.
• columns – specify columnar layout browsers.
• filter – specify (image) filter browsers.
• font face – specify downloadable font face browsers.
• hyphenation – mixin breaking space , injecting hypens overflowing text
• images – specify linear gradients , radial gradients many browsers.
• inline block – declare element inline block browsers.
• opacity – specify opacity browsers.
• css regions – specify css regions supported browsers.
• text shadow – specify text shadow browsers.
• transform – specify transformations many browsers.
• transition – specify style transition browsers.

from this, can compass user interface (css3/user-interface) isn't bundled compass/css3 need call also, after css3 call:

@import "compass/css3" @import "compass/css3/user-interface" //other imports 

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update

compass 0.13.alpha.10 onwards

looks 0.13.alpha.10 compass imports user-interface well since documentation page updated:

• user interface – declare element inline block browsers.

also added animation well:

• animation – specify css3 animation property , sub-properties.

therefore @import "compass/css3" enough now.