Bulma Gulp Minimal Setup

custom.sass

@import "../node_modules/bulma/sass/utilities/initial-variables"

// custom overrides and general styles
@import "./general/style.sass"
@import "./mymodule/style.sass"
// 

@import "../node_modules/bulma/bulma"

gulpfile.js

'use strict';


var gulp = require('gulp');
var sass = require('gulp-sass');
var cleanCSS = require('gulp-clean-css');
var concat = require('gulp-concat');
var bless = require('gulp-bless');


var paths = {
	'source-sass': './sass/*.sass',
	'transpiled-css': './css',
};

gulp.task('sass', [], function () {
  return gulp.src(paths['source-sass'])
    .pipe(sass().on('error', sass.logError))
    //.pipe(uglify())
    .pipe(concat('all.min.css'))
    .pipe(bless())
    .pipe(cleanCSS({compatibility: 'ie10'}))
    .pipe(gulp.dest(paths['transpiled-css']));
});

gulp.task('sass:watch', function () {
  gulp.watch([paths['source-sass']], ['sass']);
});

gulp.task('default', ['sass', 'sass:watch']);

package.json

{
  "name": "",
  "version": "1.0.0",
  "description": "",
  "main": "gulpfile.js",
  "dependencies": {
    "bulma": "^0.5.3",
    "gulp": "^3.9.1",
    "gulp-bless": "^4.0.0",
    "gulp-clean-css": "^3.9.0",
    "gulp-concat": "^2.6.1",
    "gulp-sass": "^3.1.0"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}