[R-pkg-devel] Installing conda dependecy onAttach

Assume an R package (`myRpackage`) that has a conda package
(`condaDependecy`) as a system requirement. The file `DESCRIPTION` of
the R package would read like:

      Package: myRpackage
      ...
      SystemRequirements: condaDependecy (>= 0.1)
      ...

How can I ensure the automatic installation of this condaDependecy (i.e.
`conda install condaDependency`) upon installing the R package itself
(i.e. `install.packages("myRpackage")`), assuming that myRpackage is
listed on CRAN?

I would prefer a method less "clunky" as

      .onAttach = function(libname = find.package("myRpackage"), pkgname
= "myRpackage") {
          system("conda install -y condaDependency")
      }