This is the Sage Bionetworks Staging R Archive Network (Staging-RAN) - a CRAN-like repository for R packages published by Sage Bionetworks.
Packages in this RAN can be installed or upgraded using the standard
install.packages() command by adding this RAN to the repository list, e.g.:
install.packages("synapser", repos=c("http://staging-ran.synapse.org", "https://cloud.r-project.org"))
Alternatively, edit your
~/.Rprofile and configure your default repositories:
after which you may run