Nvim-r
This plugin turns vim/Neovim into a fully fledged R IDE[1]. Once added as a vim plugin it will try to compile a backend executable called nvimcom[2].
If nvimcom Installation Fails
This Just Works ™ but you have to explictly install GCC on system packages so the plugin script can find it and compile the code it needs. If GCC is not explicitly installed, then it will print an "updating nvimcom" message and then a criptyc compilation error log.