Cannot import from node_modules without `native: true` (documentation?)

This issue may be a lack of precise documentation.
If this is the case, I will write a PR with the relevant part included, or an example.

Problem

The only way of importing an external sass file (external = from node_modules) is to set native: true and with an @import from node_modules (full path or with an includePaths).

Example

Here is the one solution (lost a couple of hours to find out) on how to import “normalize-scss” from node_modules.

front/app/app.scss:

@import "node_modules/normalize-scss/sass/normalize/import-now";
// "normalize/import-now" comes from normalize-scss documentation
// @import "normalize/import-now" should work with an includePath in brunch-config

brunch-config.js:

module.exports = {
    plugins: {
        sass: {
            mode: 'native', // does not work without, or with 'ruby'
        }
    },
};

Versions

brunch: 2.9.1
node-sass: 3.8.0
sass-brunch: 2.9.0

[kgcreative]

@denysdovhan I also noticed he didn’t have includePaths on his plugins / sass / options. That was also going to be my suggestion.

Include paths is documented in readme.md: https://github.com/brunch/sass-brunch#options

[denysdovhan]

@tomsquest ¯_(ツ)_/¯