Installing package(s) into ... (as ‘lib’ is unspecified)

Dear All,

this may be a trivial problem. A collaborator has created an R package for internal use (not available on CRAN). This installs and works fine on my Mac but fails to install on windows.

  

When I install the packagein windows by browing and pointing to the .zip file I get the following error:

  

install.packages("C:/Users/rvardava/RiskPerceptionNetworks/Tools/nirm/nirm.tags/nirm_0.6.5.zip", repos = NULL)

Installing package(s) into ?C:/Program Files/R/R-2.15.3/library?
(as ?lib? is unspecified)

install.packages("C:/Users/rvardava/RiskPerceptionNetworks/Tools/nirm/nirm.tags/nirm_0.6.4.zip", repos = NULL)

Installing package(s) into ?C:/Program Files/R/R-2.15.3/library?
(as ?lib? is unspecified)

  

However if I install a package from CRAN (e.g. deSolve) the same warning appears initially - but it continues and installs the package with no problems:

install.packages("deSolve")

Installing package(s) into ?C:/Program Files/R/R-2.15.3/library?
(as ?lib? is unspecified)
trying URL 'http://cran.stat.ucla.edu/bin/windows/contrib/2.15/deSolve_1.10-6.zip'
Content type 'application/zip' length 2659517 bytes (2.5 Mb)
opened URL
downloaded 2.5 Mb

package ?deSolve? successfully unpacked and MD5 sums checked

The downloaded binary packages are in
  C:\Users\rvardava\AppData\Local\Temp\RtmpO8Ul1g\downloaded_packages