# Running 0.8.1 though having 0.9 gem installed

**URL:** <https://www.ruby-forum.com/t/running-0-8-1-though-having-0-9-gem-installed/199569>\
**Category:** Radiant CMS\
**Created:** [November 24, 2010, 11:50am UTC](https://www.ruby-forum.com/t/running-0-8-1-though-having-0-9-gem-installed/199569 "2010-11-24T11:50:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![okkezSS](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/85f322/32.png) [@okkezSS](https://www.ruby-forum.com/u/okkezSS)\
**Post date:** [November 24, 2010, 11:50am UTC](https://www.ruby-forum.com/t/running-0-8-1-though-having-0-9-gem-installed/199569/1 "2010-11-24T11:50:50Z")

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Hello

I am qiet new to radiant and I am considering to replace Plone, which  
I am currently using for my website with it. Since my website is  
bilingual (main language german) I probably need the  
‘multilingual\_pages’-extension that doesn’t work with 0.9.1. So I  
tried to simply install the 0.8.1 gem and run this version by adding

gem ‘radiant’, ‘0.8.1’

to environment.rb but this doesn’t work. So my question is:

Is is possible to run different Radiant versions in parallel or do I  
need to deinstall 0.9 completely to be able to run 0.8.1?

Thanks in advance, T.

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**Author:** ![TSNST](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/f04885/32.png) [@TSNST](https://www.ruby-forum.com/u/TSNST)\
**Post date:** [November 24, 2010, 3:47pm UTC](https://www.ruby-forum.com/t/running-0-8-1-though-having-0-9-gem-installed/199569/2 "2010-11-24T15:47:35Z")

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On Wed, Nov 24, 2010 at 4:49 AM, T.N.T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Is is possible to run different Radiant versions in parallel or do I  
> need to deinstall 0.9 completely to be able to run 0.8.1?

i find the easiest way to handle it is to lock each project to the  
version of radiant needed.

(from inside your project directory)

rake radiant:freeze:gems # locks to the version of radiant you  
installed through rubygems

rake radiant:freeze:edge TAG=0.8.2 # locks to version 0.8.2 - requires  
git to be in your PATH

you could also download an archive of a previous version and unpack it  
to /your/project/vendor/radiant  
archives are available at [https://github.com/radiant/radiant/downloads](https://github.com/radiant/radiant/downloads)

with any of these you will end up with a completely isolated version  
of radiant kept in each project in the vendor/radiant directory.