ERROR when installing jekyll

[Vercryger]

When i trying to install jekyll with $ gem install jekyll i got this:

ERROR:  Loading command: install (LoadError)
    cannot load such file -- zlib
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

I have already installed this package:

$ ruby -v
ruby 2.1.2p95 (2014-05-08 revision 45877) [i686-linux]
$ gem -v
2.2.2
$ sudo update-alternatives --config ruby
There is only one alternative in link group ruby: /usr/bin/ruby1.9.1
Nothing to configure.
$ sudo update-alternatives --config gem
There is only one alternative in link group gem: /usr/bin/gem1.9.1
Nothing to configure.

[albertogg]

Hi @Vercryger, It seems that zlib is missing... If you are using Ubuntu I believe its name will be zlib1g-dev; try installing it and see if it solves your problem.

[Vercryger]

Hi @albertogg, zlib1g-dev is already installed in the newest version, i don't understand :/

[albertogg]

Did you install it before installing your Rubies?

[Vercryger]

Mmm i think no, should i have to?

[albertogg]

I'm not completely sure of, but I always do, you can try that.

[Vercryger]

Great! It's all working! I followed this steps:
First i removed all previously installed rubies on my OS.
And next this:

sudo apt-get update
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties

sudo apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev
curl -L https://get.rvm.io | bash -s stable
source ~/.rvm/scripts/rvm
echo "source ~/.rvm/scripts/rvm" >> ~/.bashrc
rvm install 2.1.2
rvm use 2.1.2 --default

and finally
gem install jekyll
and Bingo!

Thanks a lot! This thread can be closed.

[albertogg]

No problem! glad I could help.

[thomasdola]

how did y remove all previously installed rubies on your OS???
need help with that... thank y...

[Vercryger]

In my case, i did that just removing from my ubuntu synaptic any gem and ruby too. Then i deleted all my gems from RVM, i followed this guide.
Remember, you have to have Node previously installed for Jekyll.