diff --git a/docs/source/config_files.rst b/docs/source/config_files.rst index 0de39d94..fe747097 100644 --- a/docs/source/config_files.rst +++ b/docs/source/config_files.rst @@ -144,9 +144,10 @@ To install your repository like an R package, you may include a ``DESCRIPTION`` file. repo2docker installs the package and dependencies from the ``DESCRIPTION`` by running ``devtools::install_local(getwd())``. -You also need to have a ``runtime.txt`` file that is formatted as -``r---
``, where YYYY-MM-DD is a snapshot of MRAN that will be -used for your R installation. +You can also have have a ``runtime.txt`` file that is formatted as +``r---
``, where YYYY-MM-DD is a snapshot of CRAN that will be used +for your R installation. If ``runtime.txt`` isn't provided in this case, a +recent date will be used. .. _postBuild: