[R] Problem installing R packages in OpenBSD

[Bruce]

OS:  OpenBSD version 4.1 i386
R version 2.4.1 (2006-12-18) installed as a binary package

$ ls
mapproj_1.1-7.1.tar.gz     maps_2.0-36.tar.gz

$ sudo R CMD INSTALL mapproj_1.1-7.1.tar.gz

/usr/local/lib/R/bin/INSTALL[118]: 
  .: /usr/obj/i386/R-2.4.1/fake-i386/usr/local/lib/R/share/sh/dcf.sh: not 
found

I get the same error message from the R command prompt using 
install.packages("mapproj", dep=TRUE)

Questions regarding  /usr/obj/i386/R-2.4.1/fake-i386:  
o Where did this path come from?  
o Is there a conflict between OpenBSD ports and R packages?
o Is OpenBSD ports trying to do the package install?  If so, how do I stop it?

Please note that I have installed R packages successfully on Linux, Windows XP 
and FreeBSD.

Background information
-------------------------------------------
Environment variables:
$ echo $R_HOME
/usr/local/lib/R
$ echo $R_LIBS
/usr/local/lib/R/library

R install:
$ pwd
/usr/local/lib/R/share/sh
$ ls -l
total 16
-r--r--r--  1 root  bin   392 Mar  9 00:57 dcf.sh
-r--r--r--  1 root  bin    27 Mar  9 00:57 echo.sh
-r--r--r--  1 root  bin  1506 Mar  9 00:57 help-links.sh
-r--r--r--  1 root  bin   825 Mar  9 00:57 help-print.sh

Thanks