lbry-redux is a module which contains common React and redux code shared between lbry-app and lbry-android.
Add lbry-redux as a dependency to your package.json file.
"lbry-redux": "lbryio/lbry-redux"
If you intend to make changes to the module and test immediately, you can use npm link to add the package to your node_modules folder. This will create a symlink to the folder where lbry-redux was cloned to.
cd lbry-redux
sudo npm link
cd /<path>/<to>/<project>/node_modules
npm link lbry-redux
Run $ npm build.