Cannot install pi_piper on minibian (Raspberry Pi)

[blogmywiki]

I'm trying to do a fresh install using the minibian distro.

It won't let me install pi_piper saying that it requires RubyGems version >- 2.0.0

I have apt-get updated

It suggests gem update --system but I get an error saying this is disabled in Debian as it can break Debian.

Any advice on how to proceed?

(I then over-rode this to force a gem update and now get the following error when I run the printer script pi-printer.rb)

/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- serialport (LoadError)
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from ./pi-printer.rb:5:in `<main>'

[iqbalrosiadi]

In my case, i just need to synchronize between ruby and gem version.
you should check your ruby and gem version, they have to on the same version.

1. check it with command 'which ruby' and 'which gem'
2. and then check it on /usr/bin with 'ls -ltr /usr/bin/ruby*' 'ls -ltr /usr/bin/gem*'
3. after that you should change the asymlink to the exact version for both ruby and gem