Vendor prefixes in sublime text 3. How to disable in SASS?

Question

Emmet

Can't disable prefix creation in sublime. For example jcc expands to

-webkit-justify-content: center
   justify-content: center.

And the settings in Emmet are

"preferences": {
    // "css.valueSeparator": ": ",
    // "css.propertyEnd": ";"
    "sass.autoInsertVendorPrefixes": false,
    "css.autoInsertVendorPrefixes": false,
    "caniuse.enabled": false,
    "caniuse.vendors": false
  },

Prefixes are disabled for css markup, but not for SASS. Also, most emmet snippets don't work in SASS markup. Help please.