tasks/node_version.js
function(thisPackage, callback) {
      var command = nvmUse + ' && npm install -g ' + thisPackage;

      childProcess.exec(command, cmdOpts,function(err, stdout, stderr) {
        if (err) { throw err ;}
        grunt.verbose.writeln(stdout);
        grunt.log.oklns('Installed ' + thisPackage);
        callback();
      });
    }
function(thisPackage, callback) {
      var command = nvmUse + ' && npm install -g ' + thisPackage;

      childProcess.exec(command, cmdOpts,function(err, stdout, stderr) {
        if (err) { throw err ;}
        grunt.verbose.writeln(stdout);
        grunt.log.oklns('Installed ' + thisPackage);
        callback();
      });
    }
Install missing packages