r build-pack: when using ppa install r-recommended
Attempt at fixing
MODIFY
repo2docker/buildpacks/r.py
repo2docker/buildpacks/r.py
@@ -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 && \

r build-pack: when using ppa install r-recommended

Attempt at fixing https://github.com/jupyterhub/mybinder.org-deploy/issues/1308