# Switch to Ruby 1.8.7
rvm use 1.8.7

# Print out the ruby version
ruby -v

# But the output of this is:
#
#    $ ./tryrvm
#    <i> Now using ruby 1.8.7 p249 </i>  
#    ruby 1.8.6 (2010-02-05 patchlevel 399) [i686-darwin9.8.0]
#
# Why?
