r in littler says cannot find system Renviron

Binary package hint: littler

The r command in littler package dose not work.
$ lsb_release -rd
Description: Ubuntu Natty (development branch)
Release: 11.04
$ r -V |head -4
r ('littler') version 0.1.3
 svn revision 178 as of 2010-01-05 20:57:41
 built at 04:36:17 on Jan 25 2010
 using GNU R Version 2.10.1 (2009-12-14)
$ LANG=C r -e 'print(1)'
cannot find system Renviron
Fatal error: unable to open the base package

This should work as like below, although I use here the different version, but the latest release.
$ ./r -V |head -4
r ('littler') version 0.1.1
 svn revision 147 as of 2008-08-27 10:53:18
 built at 15:49:04 on Mar 18 2011
 using GNU R Version 2.12.1 (2010-12-16)
$ LANG=C ./r -e 'print(1)'
[1] 1

I am not so sure but I guess that the littler package does not any more match to r-base-core package (2.12.1-1).
Maybe the package needs recompilation, doesn't it?

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: littler 0.1.3-1
ProcVersionSignature: Ubuntu 2.6.38-7.35-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Fri Mar 18 15:57:25 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110302)
ProcEnviron:
 LANGUAGE=ja_JP:en_US:en
 PATH=(custom, user)
 LANG=ja_JP.UTF-8
 SHELL=/bin/bash
SourcePackage: littler
UpgradeStatus: No upgrade log present (probably fresh install)