> devtools::install_github("rstudio/dplyr")
Downloading GitHub repo rstudio/dplyr@master
from URL https://api.github.com/repos/rstudio/dplyr/zipball/master
Installation failed: Not Found (404)

$ sudo apt-get install libcur14-openss1-dev libxm12-dev
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  E: Unable to locate package libcur14-openss1-dev
  E: Unable to locate package libxm12-dev