How to make a Gulpfile use different inputs and outputs keeping DRY?

gulpfile.js

/* 
    This is the barebones proof of concept:
*/

const gulp = require('gulp');

const p = {
  dashboard: {
      orig: ['public/dashboard/scss/style.scss', 'public/dashboard/styles/*.css'],
      dest: 'public/dashboard/css/',
  },
  public: {
      orig: ['public/styles/custom.scss', 'public/styles/*.css'],
      dest: 'public/css/',
  },
};

gulp.task('default', function() {
  Object.keys(p).forEach(val => { // <--- The important bit! 'val' will go once as 'dashboard' and once as 'public'
    return gulp
        .src(p[val].css.orig)
        /*
          add here all your usual
          'middleware' such as:
        
        .pipe(sass())
        .pipe(concat('main.css'))
        .pipe(cleanCss())
        etc.
        */
        .pipe(gulp.dest(p[val].css.dest))
  });
});