Using install.packages with custom temp dir

Question

I would like to install a package with a security profile that does not have access to /tmp , but has its own temporary directory, for example /tmp/jeroen

Answer 1

The correct answer was given by @hadley in the comments: in order to make sure install.packages uses the custom temporary directory, one needs to do

Sys.setenv(TMPDIR="/tmp/jeroen")

in addition to:

configure.vars="TMPDIR=/tmp/jeroen"

This way both the extraction and the installation of the package avoids the system or user default temporary directory.