Error when using install_github: 'exdir' does not exist

Question

I am trying to install a package from github, but keep getting the following error;

\"Error in unzip(src, list = TRUE) : \'exdir\' does not exist\".
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Answer 1

I have got it working, and it was definitely just dumb human error. My working directory was somehow set to a location for which I didn't have write permissions. I setwd() to a folder where I have permissions and it worked just fine. I'm not sure if it was part of the solution, but @hadley's tip about setting the TMP envvar was good, and will be useful in general.