In an attempt to build up the dev environment, when I run the build_frontend script, I receive the following wall of text.
Processing ./src/home-assistant.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/polymer/polymer.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-spinner/paper-spinner.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-styles/typography.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/iron-flex-layout/iron-flex-layout-classes.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/fecha/fecha.min.js
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-checkbox/paper-checkbox.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-button/paper-button.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-input/paper-input-container.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-input/paper-input-error.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/iron-input/iron-input.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-drawer-panel/paper-drawer-panel.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/iron-media-query/iron-media-query.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/iron-pages/iron-pages.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/app-layout/app-header-layout/app-header-layout.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/app-layout/app-header/app-header.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/app-layout/app-toolbar/app-toolbar.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/iron-icon/iron-icon.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-icon-button/paper-icon-button.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-tabs/paper-tabs.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-tabs/paper-tab.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/app-layout/app-scroll-effects/effects/waterfall.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-toast/paper-toast.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-dialog/paper-dialog.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-dialog-scrollable/paper-dialog-scrollable.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-menu/paper-menu.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-item/paper-item.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-toggle-button/paper-toggle-button.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-item/paper-icon-item.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/google-apis/google-legacy-loader.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-dropdown-menu/paper-dropdown-menu.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-slider/paper-slider.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-range-slider/paper-range-slider.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-input/paper-input.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-material/paper-material.html
ERROR finding /home/public/github/home-assistant/homeassistant/components/frontend/www_static/home-assistant-polymer/bower_components/paper-progress/paper-progress.html
cp: cannot stat âbower_components/webcomponentsjs/webcomponents-lite.min.jsâ: No such file or directory
fs.js:634
return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
^
Error: ENOENT: no such file or directory, open '../frontend.html'
Any thoughts on why these files are missing?