Note that R 3.5.x binary packages are provided for modern macOS systems and most packages will also have corresponding Windows binary packages.
Specify type = 'source' to install.packages() if you wish to perform source installs.
A drat-ified CRAN-ish repo for my packages.
available.packages("https://cinc.rud.is/src/contrib") %>%
as_tibble() %>%
select(Package, Version, Imports) %>%
DT::datatable()
install.packages("cloc", repos="https://cinc.rud.is/")