* gnu/packages/cran.scm (r-shiny)[propagated-inputs]: Add r-later, r-promises, r-rlang, and r-withr. [native-inputs]: Add gfortran.
* gnu/packages/cran.scm (r-shiny)[propagated-inputs]: Add r-later, r-promises, r-rlang, and r-withr. [native-inputs]: Add gfortran.