Tk using Ruby

ruby-talk
1

ruby -v
ruby 2.7.4p191 (2021-07-07 revision a21a3b7d23) [x86_64-linux-gnu]

I want to fool around with the `Tk' GUI environment.

tried `gem install tk'. No Joy! Output at:

https://controlc.com/5665a011

Ideas please. TIA

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Duke
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