Moving from Gulp to Make. Can't say I miss Gulp at all.

1_before_gulpfile.js

var gulp = require('gulp')
  , source = require('vinyl-source-stream')
  , sass = require('gulp-sass')
  , browserify = require('browserify')
  , babelify = require('babelify')

gulp.task('build:js', function() {
  return browserify('./app/public/jsx/app.jsx')
  .transform(babelify)
  .bundle()
  .pipe(source('app.js'))
  .pipe(gulp.dest('./app/public/js'))
})

gulp.task('build:css', function () {
  return gulp.src('./app/public/scss/**/*.scss')
  .pipe(sass({
    includePaths: ['./node_modules/bootstrap-sass/assets/stylesheets']
  }))
  .pipe(gulp.dest('./app/public/css'))
});

gulp.task('default', ['build:js', 'build:css'])

2_after_Makefile

PATH  := node_modules/.bin:$(PATH)
SHELL := /bin/bash
css   := app/public/css/app.css
js    := app/public/js/app.js

all: $(js) $(css)

clean:
	rm -rf $(css) $(js)

$(js): app/public/jsx/app.jsx
	browserify $< -t babelify -o $@

$(css): app/public/scss/app.scss
	sassc -I node_modules/bootstrap-sass/assets/stylesheets $< $@

.PHONY: clean