Вы про это?

Не получается настроить. Пытаюсь настроить обе сборки.

'use strict';

var techs = {
    // essential
    fileProvider: require('enb/techs/file-provider'),
    fileMerge: require('enb/techs/file-merge'),
    // optimization
    borschik: require('enb-borschik/techs/borschik'),
    // css
    stylus: require('enb-stylus/techs/stylus'),
    // js
    browserJs: require('enb-js/techs/browser-js'),
    // bemtree
    // bemtree: require('enb-bemxjst/techs/bemtree'),
    // bemhtml
    bemhtml: require('enb-bemxjst/techs/bemhtml'),
    bemjsonToHtml: require('enb-bemxjst/techs/bemjson-to-html')
  },
  enbBemTechs = require('enb-bem-techs'),
  levels = [
    {path: 'libs/bem-core/common.blocks', check: false},
    {path: 'libs/bem-core/desktop.blocks', check: false},
    {path: 'libs/bem-components/common.blocks', check: false},
    {path: 'libs/bem-components/desktop.blocks', check: false},
    {path: 'libs/bem-components/design/common.blocks', check: false},
    {path: 'libs/bem-components/design/desktop.blocks', check: false},
    {path: 'libs/bem-forms/common.blocks', check: false},
    'common.blocks',
    'desktop.blocks'
  ],
  fs = require('fs'),
  path = require('path'),
  platforms = ['desktop'];

module.exports = function(config) {
  var isProd = process.env.YENV === 'production';
  config.nodes('*.bundles/*', function(nodeConfig) {
    nodeConfig.addTechs([
      // essential
      [enbBemTechs.levels, {levels: levels}],
      [techs.fileProvider, {target: '?.bemjson.js'}],
      [enbBemTechs.bemjsonToBemdecl],
      [enbBemTechs.deps],
      [enbBemTechs.files],
      // css
      [techs.stylus, {
        target: '?.css',
        sourcemap: false,
        autoprefixer: {
          browsers: ['ie >= 10', 'last 2 versions', 'opera 12.1', '> 2%']
        }
      }],
      // bemtree
      // [techs.bemtree, { sourceSuffixes: ['bemtree', 'bemtree.js'] }],

      // bemhtml
      [techs.bemhtml, {sourceSuffixes: ['bemhtml', 'bemhtml.js']}],

      // html
      [techs.bemjsonToHtml],

      // client bemhtml
      [enbBemTechs.depsByTechToBemdecl, {
        target: '?.bemhtml.bemdecl.js',
        sourceTech: 'js',
        destTech: 'bemhtml'
      }],
      [enbBemTechs.deps, {
        target: '?.bemhtml.deps.js',
        bemdeclFile: '?.bemhtml.bemdecl.js'
      }],
      [enbBemTechs.files, {
        depsFile: '?.bemhtml.deps.js',
        filesTarget: '?.bemhtml.files',
        dirsTarget: '?.bemhtml.dirs'
      }],
      [techs.bemhtml, {
        target: '?.browser.bemhtml.js',
        filesTarget: '?.bemhtml.files',
        sourceSuffixes: ['bemhtml', 'bemhtml.js']
      }],

      // js
      [techs.browserJs, {includeYM: true}],
      [techs.fileMerge, {
        target: '?.js',
        sources: ['?.browser.js', '?.browser.bemhtml.js']
      }],

      // borschik
      [techs.borschik, {source: '?.js', target: '?.min.js'}],
      [techs.borschik, {source: '?.css', target: '?.min.css', tech: 'cleancss'}]
    ]);

    nodeConfig.addTargets([/* '?.bemtree.js', */ '?.html', '?.min.css', '?.min.js']);

  });

  // Создаем директории для merged-бандлов (1)
  platforms.forEach(function(platform) {
    var node = path.join(platform + '.bundles', 'merged');

    if (!fs.existsSync(node)) {
      fs.mkdirSync(node);
    }
  });

  // Предоставляем BEMDECL-файлы из бандлов (2)
  config.nodes('*.bundles/*', function(nodeConfig) {
    var node = path.basename(nodeConfig.getPath());

    if (node !== 'merged') {
      nodeConfig.addTechs([
        [techs.fileProvider, {target: '?.bemdecl.js'}]
      ]);
    }
  });

  // Настраиваем сборку merged-бандла
  config.nodes('*.bundles/merged', function(nodeConfig) {
    var dir = path.dirname(nodeConfig.getPath()),
      bundles = fs.readdirSync(dir),
      bemdeclFiles = [];

    // Копируем BEMDECL-файлы в merged-бандл (3)
    bundles.forEach(function(bundle) {
      if (bundle === 'merged') return;

      var node = path.join(dir, bundle),
        target = bundle + '.bemdecl.js';

      nodeConfig.addTech([techs.provideBemdecl, {
        node: node,
        target: target
      }]);

      bemdeclFiles.push(target);
    });

    // Объединяем скопированные BEMDECL-файлы (4)
    nodeConfig.addTech([techs.mergeBemdecl, {sources: bemdeclFiles}]);

    // Обычная сборка бандла (5)
    nodeConfig.addTechs([
      [techs.levels, {levels: ['desktop.blocks']}],
      [techs.deps],
      [techs.files],

      [stylus],
      [browserJs]
    ]);

    nodeConfig.addTargets(['?.css', '?.js']);
  });
};

@antonazgarovich вот дифф для project-stub, включающий сборку merged-бандла: https://github.com/bem/project-stub/compare/merged?expand=1

@tadatuta Спасибо все работает!