What you really want here, is a dedicated easyconfig for `Rgputools`, see for example the one for the `XML` R library (see https://github.com/hpcugent/easybuild-easyconfigs/blob/master/easybuild/easyconfigs/x/XML/XML-3.95-0.1-goolf-1.4.10-R-2.15.2.eb), especially because `Rgputools` requires a dependency `CUDA`, which hits our rule of thumb for creating a separate easyconfigs (see `XML`).

Also, touching the R easyconfigs now is a bit of a nightmare, see #279 why. ;-)