Dysfunction with build template if need block create in html before initialize JS

[pavelpower]

https://ru.bem.info/forum/1018/

What i mean?

if i wanna create block in HTML before initialization js with library bem-pr. I will change block spec-content.

specs.configure({
    langs: false,
    destPath: 'specs',
    levels: layers,
    templateEngine: {
        templateTech: require('enb-bh/techs/bh-bundle'),
        templateOptions: {
            devMode: false
        },
        htmlTech: require('enb-bh/techs/bemjson-to-html'),
        htmlTechOptionNames: { bemjsonFile: 'bemjsonFile', templateFile: 'bhFile' }
    },
    sourceLevels: [
        { path: 'libs/bem-pr/spec.blocks', check: false }
    ].concat(layers),

    jsSuffixes: ['js'],
    specSuffixes: ['spec.js']
});

sample block b-legend

module.exports = function(bh) {
    bh.match('spec-content', function () {
        return {block: 'b-legend'};
    });
};

But, then enb-bem-spec not will add my block to the output bemdecl's file for build html.