Basically the package uses some native modules, it will attempt to download pre-built binaries for those modules but if it can’t find an exact match for your system it needs to build them - hence the need for build tools. Unfortunately I don’t know why it wouldn’t detect them if you have them installed, best bet is to bring this up on on the x-terminal-reloaded GitHub repo or in our Discord to see if the dev for that package can help a bit more.
Not counting my “fancy” tea - loose leaf stuff etc. I always default to Twinings English Breakfast.