Unknown Ruby Interpreter Version (Do Not Know How to Handle): Ruby_Version

How to fix Unknown ruby interpreter version (do not know how to handle): RUBY_VERSION.

Coincidentally today I am also trying to setup Jekyll and am seeing the same problem. I am using RVM and it otherwise works fine (running multiple Rails dev sites locally). When I run env | grep 'RUBY' I get:

$ env | grep 'RUBY'
MY_RUBY_HOME=/Users/myusername/.rvm/rubies/ruby-2.0.0-p247
RUBY_VERSION=ruby-2.0.0-p247

However, I just continued and ran bundle install, then bundle exec jekyll serve and the site booted up without issue.

Unknown ruby interpreter version (do not know how to handle): RUBY_VERSION

RUBY_VERSION should be a specific version string, like '2.4.2' (with the quotes).

However, if you don't particularly care which Ruby version you use, then you should be able to just remove the whole line and rvm will use the default.

RVM error: Unknown ruby interpreter version when trying to verify an .rvmrc file

Looks like a typo in your .rvmrc file. Perhaps it should read:

environment_id="rvm 1.9.2-p180@projectr3"

I think you are missing the dash before the p180.

ian.

RVM, where is Ruby 3.0.0?

If you have not updated rvm do that first RVM Upgrading

rvm get stable 
# or 
rvm get master # for even newer versions not in stable 3.0.0 in this case

To see all available rubies run

rvm list remote all 
# or
rvm list known # as pointed out in the comments

you should see ruby-3.0.0 in the list of available rubies

Then run

rvm install ruby-3.0.0

CentOS RVM Error: Unknown ruby string (do not know how to handle): ruby-2.1.0

I just came across the same issue and filed it at https://github.com/wayneeseguin/rvm/issues/3244.

This appears to be a bug in rvm 1.26.7 and as a workaround, you can downgrade to 1.26.6 by running:

\curl -sSL https://get.rvm.io | bash -s -- --version 1.26.6
rvm reload

Edit:
RVM 1.26.8 was releases and fixed this issue, running rvm get stable is the preferred fix now.

What's the right string to use when installing Ruby 3.1 through RVM on Mac OS Big Sur?

> rvm list known
# MRI Rubies
[ruby-]1.8.6[-p420]
[ruby-]1.8.7[-head] # security released on head
[ruby-]1.9.1[-p431]
[ruby-]1.9.2[-p330]
[ruby-]1.9.3[-p551]
[ruby-]2.0.0[-p648]
[ruby-]2.1[.10]
[ruby-]2.2[.10]
[ruby-]2.3[.8]
[ruby-]2.4[.10]
[ruby-]2.5[.8]
[ruby-]2.6[.6]
[ruby-]2.7[.2]
[ruby-]3[.0.0]
ruby-head

3.1 doesn't seem to be on the list, but to install it you would use:

> rvm install ruby-3.1.0

or

> rvm install 3.1.0

But again, doesn't seem available, at least in rvm stable or latest. Looking at GitHub, they have merged patches to add 3.1 support but the latest releases don't list it: https://github.com/rvm/rvm/releases.

RVM With JRuby 1.7.0 Unknown Ruby Interpreter

RVM has limited support of the ruby directive, you can use comment to overwrite what will be used by RVM:

#ruby=jruby-1.7.0

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