devtools::install_github rersults in partial install

[taqtiqa-mark]

Install via devtools::install_github seems to only partially complete:

> devtools::install_github("hadley/multidplyr")
Downloading GitHub repo hadley/multidplyr@master
from URL https://api.github.com/repos/hadley/multidplyr/zipball/master
Installation failed: cannot open file 'C:/Users/<redacted>/AppData/Local/Temp/Rtmp8yh9oB/devtools5cc0298015e9/hadley-multidplyr-0085ded/R/cluster-assign.R': No such file or directory
>

When I look in that folder:

{ hadley-multidplyr-0085ded }  » ls
DESCRIPTION  NAMESPACE

[hadley]

Works for me; something must've been messed up with your R install.