./miniruby -I./lib -I. -I.ext/common  ./tool/rbinstall.rb --make="make" --dest-dir="" --extout=".ext" --mflags="" --make-flags="" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="doc" --install=all --rdoc-output=".ext/rdoc"
installing binary commands:   /usr/local/bin
installing base libraries:    /usr/local/lib
installing arch files:        /usr/local/lib/ruby/2.1.0/x86_64-darwin11.4.2
installing pkgconfig data:    /usr/local/lib/pkgconfig
installing extension objects: /usr/local/lib/ruby/2.1.0/x86_64-darwin11.4.2
installing extension objects: /usr/local/lib/ruby/site_ruby/2.1.0/x86_64-darwin11.4.2
installing extension objects: /usr/local/lib/ruby/vendor_ruby/2.1.0/x86_64-darwin11.4.2
installing extension headers: /usr/local/include/ruby-2.1.0/x86_64-darwin11.4.2
installing extension scripts: /usr/local/lib/ruby/2.1.0
installing extension scripts: /usr/local/lib/ruby/site_ruby/2.1.0
installing extension scripts: /usr/local/lib/ruby/vendor_ruby/2.1.0
installing extension headers: /usr/local/include/ruby-2.1.0/ruby
installing rdoc:              /usr/local/share/ri/2.1.0/system
installing capi-docs:         /usr/local/share/doc/ruby
installing command scripts:   /usr/local/bin
installing library scripts:   /usr/local/lib/ruby/2.1.0
installing common headers:    /usr/local/include/ruby-2.1.0
installing manpages:          /usr/local/share/man/man1
installing default gems:      /usr/local/lib/ruby/gems/2.1.0 (build_info, cache, doc, gems, specifications)
                              bigdecimal 1.2.0
                              io-console 0.4.2
                              json 1.7.7
                              minitest 4.3.2
                              psych 2.0.0
                              rake 0.9.6
                              rdoc 4.0.0
                              test-unit 2.1.0.0
➜  ruby-trunk  ruby -v
ruby 2.1.0dev (2013-03-15) [x86_64-darwin11.4.2]

haha