packrat::init() without internet connection

Hi,

Our R server is not connected to the internet.

We have installed Packrat using: R CMD INSTALL packrat_0.4.4.tar.gz

When we initialize Packrat in Rstudio it tries to fetch online resources and fails after that.

Is it possible to configure Packrat to work in offline mode and initialize without checking for online resources?

packrat::init()
Initializing packrat project in directory:

• "/home/user1234/test"
  Warning: unable to access index for repository http://cran.rstudio.com/src/contrib

Adding these packages to packrat:
_
packrat 0.4.4

Warning: unable to access index for repository http://cran.rstudio.com/src/contrib
Fetching sources for packrat (0.4.4) ... Failed
Error in snapshotSources(project, activeRepos(project), allRecordsFlat) :
Errors occurred when fetching source files:
Error in getSourceForPkgRecord(pkgRecord, sourceDir, availablePkgs, repos) :
Could not find sources for packrat (0.4.4).

Start at the packrat::init() entry point and reproduce the reported failure in an R environment without internet access, using the command output in this issue as the baseline. Determine how initialization currently fetches packrat sources and define completion as successful initialization without contacting online repositories when offline operation is requested.