SassError: Invalid CSS after "..., -apple-system": expected ":", was ", BlinkMacSystemFon"

[VandanaAwasthi]

trying to import a JSON file ,it works great except the strings are not quoted so if JSON has a property
"typography": {
"font-family": "Arial, -apple-content, BlinkMacSystemFont"
}
it gives an error as it gets imported without quotes and build fails.

I see there are some call backs I can send in options will that help in keeping the quotes of values returned ? if so can someone help me with an example pls.

Note: I cannot change to double quote the values.

[ayohdev]

Running into this issue as well. Not working with font families...

            "fontFamilies": [
                {
                    "fontFamily": "'Poppins', sans-serif",
                    "slug": "poppins",
                    "name": "Poppins (heading)"
                }
            ],
       }