rocketchat-uipackages directly, but if you're keeping in sync with active development it would be easier to avoid conflicts by creating your own theme package.
package.jsfile containing the description, e.g:
rocketchat-themepackage has methods for including Less asset files in the build. Less files (and the a server.coffee or .js file to load them) must first be included in the
package.jsmanifest (within the
'aldeed:template-extension'package (include it in your main packages file). In your package manifest, declare use of the
template-extensionpackage, then add your template files to Meteor