grunt-jade - how to compile single jade file instead of everything

I have the following in my jade.js file

'use strict';

var config = require('../config');

module.exports = {
  dist: {
    options: {
    pretty: true,
    debug: false,
    timestamp: '<%= new Date().getTime() %>'
  },
  files: [{
    expand: true,
    cwd: 'html_templates/views/',
    src: '**/*.jade',
    dest: 'html_templates/html/',
    ext: '.html'
  }]
 }
};

It is working great ! The only problem is that, i am working on a very large application and my jade files are over 10mb. When i modify the view of one jade file and run 'grunt jade'. It recompiles all my html (takes about 5 minutes). How to i tell grunt to only compile the relevant jade file(only one html file)

Example: I am working on:

html_templates/views/module/landingpage2.jade

I want to compile only:

html_templates/html/module/landingpage1.html

Please help