r build-pack: when using ppa install r-recommended
Attempt at fixing
@@ -250,6 +250,7 @@ class RBuildPack(PythonBuildPack):
apt-get update && \
apt-get install --yes r-base={R_version} \
r-base-dev={R_version} \
+ r-recommended={R_version} \
libclang-dev && \
apt-get -qq purge && \
apt-get -qq clean && \
