multiruby and JRuby

surfboard:~ asari$ rm -rf .multiruby/
surfboard:~ asari$ jruby -S multiruby_setup jruby:git:current jruby:tar:1.3.1 rbx:git:current mri:tar:1.8.7
creating /Users/asari/.multiruby
creating build
creating install
creating versions
creating tmp
Running command: git clone git://github.com/jruby/jruby.git jruby
Initialize jruby/.git
remote: Counting objects: 110862, done.
remote: Compressing objects: 100% (29969/29969), done.
remote: Total 110862 (delta 77071), reused 108815 (delta 75516)
Receiving objects: 100% (110862/110862), 44.64 MiB | 453 KiB/s, done.
Initialized empty Git repository in /Users/asari/.multiruby/versions/jruby/.git/
Resolving deltas: 100% (77071/77071), done.
Checking out files: 100% (4744/4744), done.
Initialized empty Git repository in /Users/asari/.multiruby/versions/jruby/.git/
  Determining latest version for 1.3.1
    Fetching jruby-bin-1.3.1.tar.gz via HTTP... this might take a while.
Running command: git clone git://github.com/evanphx/rubinius.git rubinius
Initialize rubinius/.git
remote: Counting objects: 116196, done.
remote: Compressing objects: 100% (34437/34437), done.
Receiving objects: 100% (116196/116196), 86.56 MiB | 580 KiB/s, done.
remote: Total 116196 (delta 79272), reused 115042 (delta 78286)
Initialized empty Git repository in /Users/asari/.multiruby/versions/rubinius/.git/
Resolving deltas: 100% (79272/79272), done.
Checking out files: 100% (7822/7822), done.
Initialized empty Git repository in /Users/asari/.multiruby/versions/rubinius/.git/
  Determining latest version for 1.8.7
    Fetching ruby-1.8.7-p174.tar.gz via HTTP... this might take a while.
building and installing jruby
Running command: rake > log.build 2>&1
creating /Users/asari/.multiruby/install/jruby-1.3.1
Running command: tar zxf ../versions/jruby-bin-1.3.1.tar.gz
building and installing jruby-1.3.1
building and installing rubinius
Running command: rake > log.build 2>&1
creating /Users/asari/.multiruby/install/1.8.7-p174
Running command: tar zxf ../versions/ruby-1.8.7-p174.tar.gz
building and installing 1.8.7-p174
Running command: ./configure --enable-shared --prefix /Users/asari/.multiruby/install/1.8.7-p174 > log.configure 2>&1
Running command: (nice make -j4; nice make) > log.build 2>&1
Running command: make install > log.install 2>&1
surfboard:~ asari$ jruby -S multiruby -S gem list
VERSION = jruby
CMD     = ~/.multiruby/install/jruby/bin/jruby -S gem list
sources (0.0.1)

RESULT = 0

VERSION = jruby-1.3.1
CMD     = ~/.multiruby/install/jruby-1.3.1/bin/jruby -S gem list
rake (0.8.7)
rspec (1.2.6)
sources (0.0.1)

RESULT = 0

VERSION = rubinius
CMD     = ~/.multiruby/install/rubinius/bin/rbx -S gem list


RESULT = 0

VERSION = 1.8.7-p174
CMD     = ~/.multiruby/install/1.8.7-p174/bin/ruby -S gem list
/usr/bin/gem:8:in `require': no such file to load -- rubygems (LoadError)
	from /usr/bin/gem:8

RESULT = 256

TOTAL RESULT = 1 failures out of 4

Passed: jruby, jruby-1.3.1, rubinius
Failed: 1.8.7-p174