Why can't I install Gosu into my rbenv Ruby?

Asked Jul 19 '13 at 13:43

Active Jul 20 '13 at 17:42

Viewed 424 times

I installed rbenv yesterday to install Gosu. I followed "How to Install Rbenv on OS X" and everything worked fine.

Today, I started a new Gosu project, and it gave me this error:

 my_game.rb:1:in `require': no such file to load -- gosu (LoadError)
from my_game.rb:1

So I tried:

gem install Gosu

Which gives:

ERROR:  While executing gem ... (Gem::FilePermissionError)
You don't have write permissions into the /Library/Ruby/Gems/1.8 directory.

But rbenv global gives:

1.9.3-p0

What is going on? Shouldn't the running Ruby be 1.9.3-p0? I tried rbenv rehash several times and I also tried rbenv init.

I also have:

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"

in my ~/.zshrc file.

What am I doing wrong?

edited Jul 19 '13 at 15:30

the Tin Man

asked Jul 19 '13 at 13:43

Roald

I would actually recommend chruby. But you can debug this more. What is the rbenv command for switching rubies and did you run it? What does it say if you type `which gem`? – David Grayson Jul 19 '13 at 15:13
What is the output of `gem env`? – the Tin Man Jul 19 '13 at 15:26
which gem = /usr/bin/gem – Roald Jul 19 '13 at 15:49
gem env = Ruby Version 1.8.7 – Roald Jul 19 '13 at 15:50
OK, so I missed something about the Gem. What did I miss? And thanks for your responses. – Roald Jul 19 '13 at 15:52
Also, ruby -v gives: 1.9.3-p0 – Roald Jul 19 '13 at 16:29

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