Ruby getting "can't modify frozen string" error when trying to use Rudyscript2exe

I've got a ruby script on this Mac, that I want to distribute to Windows users. I'm trying to use the gem Rubyscript2exe to make an executable, but when I run the following command:

$ rubyscript2exe jabberbot.rb

I get the folowing error:

/Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/bin/rubyscript2exe:5:in `replace': can't modify frozen string (TypeError)
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/bin/rubyscript2exe:5
from /usr/bin/rubyscript2exe:19:in `load'
from /usr/bin/rubyscript2exe:19

/Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/bin/rubyscript2exe is

gemdir  = File.expand_path("..", File.dirname(__FILE__))
realstuff   = File.expand_path("realstuff.rb", gemdir)
isapplication   = File.basename(File.dirname(__FILE__)) == "bin"

$0.replace(realstuff)   if isapplication

load(realstuff)

Line 19 of /usr/bin/rubyscript2exe is

load Gem.bin_path('rubyscript2exe', 'rubyscript2exe', version)

New issue:

After replacing the code as answered I am now getting this error:

/private/tmp/tar2rubyscript.d.4970.1/rubyscript2exe/rubyscript2exe.rb:37:in `expand_path': can't convert nil into String (TypeError)
from /private/tmp/tar2rubyscript.d.4970.1/rubyscript2exe/rubyscript2exe.rb:37:in `appdir'
from /private/tmp/tar2rubyscript.d.4970.1/rubyscript2exe/rubyscript2exe.rb:96
from /private/tmp/tar2rubyscript.d.4970.1/rubyscript2exe/init.rb:2:in `load'
from /private/tmp/tar2rubyscript.d.4970.1/rubyscript2exe/init.rb:2
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:632:in `load'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:632
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:577:in `newlocation'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:505:in `newlocation'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:472:in `newlocation'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:505:in `newlocation'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe开发者_如何学运维-0.5.3/realstuff.rb:577:in `newlocation'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/realstuff.rb:619
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/bin/rubyscript2exe:11:in `load'
from /Library/Ruby/Gems/1.8/gems/rubyscript2exe-0.5.3/bin/rubyscript2exe:11
from /usr/bin/rubyscript2exe:19:in `load'
from /usr/bin/rubyscript2exe:19

Your problem is due to a specification change made in ruby 1.8.7 and ruby1.9. $0 refers to the program name, but it became frozen. Are you using the newest version of rubyscript2exe? If not, try the newest version. If the problem is still there, then, as suggested by rubyscript2exe, change the line:

$0.replace(realstuff)   if isapplication

to these:

# $0.replace(realstuff)   if isapplication   # original
$__0 = realstuff   if isapplication          # added
alias $__0 $0                                # added
alias $0 $_0                                 # added

This link may help: http://www.ruby-forum.com/topic/3173966

You can use ocra: http://ocra.rubyforge.org/

This way:

gem install ocra
ocra --console myapp.rb