# Rake doesn't recognise that rubyzip gem is installed

**URL:** <https://www.ruby-forum.com/t/rake-doesnt-recognise-that-rubyzip-gem-is-installed/184781>\
**Category:** Ruby\
**Created:** [March 8, 2010, 4:04pm UTC](https://www.ruby-forum.com/t/rake-doesnt-recognise-that-rubyzip-gem-is-installed/184781 "2010-03-08T16:04:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cmaxvv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/85f322/32.png) [@cmaxvv](https://www.ruby-forum.com/u/cmaxvv)\
**Post date:** [March 8, 2010, 4:04pm UTC](https://www.ruby-forum.com/t/rake-doesnt-recognise-that-rubyzip-gem-is-installed/184781/1 "2010-03-08T16:04:33Z")

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Hi all. First of all apologies for a rails-ish post but i think this is  
a more general ruby gems problem.

I’m trying to freeze the rubyzip gem into an app with rake, and get an  
error that it isn’t installed. But it is installed:

> gem list | grep zip  
> rubyzip (0.9.1)

I have this line in my config:  
config.gem “rubyzip”, :version =\> ‘0.9.1’

And now i try to do  
rake gems:install

It bombs out with a big stack trace, which is included at the bottom of  
this post for reference, with final part being:

Missing these required gems:  
rubyzip = 0.9.1

You’re running:  
ruby 1.8.6.111 at /usr/bin/ruby1.8  
rubygems 1.3.5 at /home/max/.gem/ruby/1.8, /var/lib/gems/1.8

Run `rake gems:install` to install the missing gems.

Which is telling me to do what i just tried to do.

Any ideas anyone? I have the exact same problem with the  
memcache-client gem as well.

grateful for any advice - max

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<div class="post-metadata">

**Author:** ![cmaxvv](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/85f322/32.png) [@cmaxvv](https://www.ruby-forum.com/u/cmaxvv)\
**Post date:** [March 8, 2010, 4:09pm UTC](https://www.ruby-forum.com/t/rake-doesnt-recognise-that-rubyzip-gem-is-installed/184781/2 "2010-03-08T16:09:50Z")

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Solved the problem - google revealed that i need to add :lib =\>  
“zip/zip” to my config.gem call, ie

config.gem “rubyzip”, :version =\> ‘0.9.1’, :lib =\> “zip/zip”

Then i was able to freeze it into the app with  
rake gems:unpack

Thanks for reading - if anyone wants to explain the logic of this to me  
i’d be happy to know - it seems like a random obstacle to me.  
max