16

I want to install new version of ruby by rbenv install 2.2.1, but I get the error 

ruby-build: definition not found: 2.2.1
 The following versions contain 2.2.1 in the name:
  rbx-2.2.1
  rbx-2.2.10

Could you please let me know how should I install version 2.2.1?

Thanks in advance!

tirdadc
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Cror2014
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  • [This answer](http://stackoverflow.com/a/23517427/4240604) might help you. Just try to update ruby-build plugin. – Den Sock May 21 '15 at 14:36

6 Answers6

21

You should upgrade ruby-build to the latest version, ruby-build is an rbenv plugin that provides an rbenv install command to compile and install different versions of Ruby on UNIX-like systems.

Using Homebrew package manager:

brew upgrade ruby-build --HEAD

If ruby-build-HEAD already installed try reinstalling it

brew reinstall ruby-build --HEAD

You can look for the current stable ruby version number at:

https://www.ruby-lang.org/en/downloads/

Then use rbenv to see the upgraded list of available options:

rbenv install --list

Install latest stable version as below (replace 2.2.2 with your version string):

rbenv install 2.2.2
rbenv rehash

To list and verify all installed versions:

rbenv versions

To set as the global ruby version (in this case 2.2.2): 

rbenv global 2.2.2

Hope this helps you and everyone else who faces similar situation in future.

Reza Hashemi
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19

Most of the answer here use brew command. So in case, you are on Ubuntu, then do these.

cd ~/.rbenv
git pull

cd ~/.rbenv/plugins/ruby-build/
git pull
Ken Ratanachai S.
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16

Just in case anyone else runs into this issue using the asdf package manager, simply update your plugins by running:

asdf plugin update --all

This will make sure you are on the latest version of ruby-build

rjwhitmer
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1

Try to update your ruby-build manually from the repository by using this command:

/Users/your-user/.rbenv/plugins/ruby-build && git pull

Replace "your-user" with your Mac User

Once you've done that you can run the install:

rbenv install 2.2.1
jvrmed
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1

The easiest way if you're using Linux and have git installed:

git -C ~/.rbenv/plugins/ruby-build pull

Hank Phung
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0

I upgraded homebrew

brew update && brew upgrade

and then was able to upgrade to 2.2.1

rbenv install '2.2.1'

Hope this helps!

Joshua Turner
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