>=dev-lang/R-3.4
>=sci-CRAN/rlang-0.1.2
>=sci-BIOC/GSVA-1.26.0
sci-CRAN/tidyr
sci-CRAN/dplyr
sci-CRAN/magrittr
sci-CRAN/tibble

r_suggests_covr?
      ( sci-CRAN/covr )

r_suggests_knitr?
      ( sci-CRAN/knitr )

r_suggests_prettydoc?
      ( sci-CRAN/prettydoc )

r_suggests_rmarkdown?
      ( sci-CRAN/rmarkdown )

r_suggests_roxygen2?
      ( sci-CRAN/roxygen2 )

r_suggests_testthat?
      ( >=sci-CRAN/testthat-2.1.0 )

dev-lang/R:=