Please install libyaml and reinstall your ruby

Question

libyaml warning doesn't go away, even if you install libyaml

gem install bundler
/home/ec2-user/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/yaml.rb:56:in `<top  (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
Fetching: bundler-1.3.4.gem (100%)
Successfully installed bundler-1.3.4

shayonj · Accepted Answer · 2013-04-01T07:23:59.400

24

First remove any previous docs of yaml by

cd .rvm/src
sudo rm -rf yaml*

Then you can do rest of the install by -

rvm pkg install libyaml

P.S You will need to reinstall ruby after this.

UPDATE: If rvm pkg seems to be deprecated. You can compile a source on your own. All you gotta do is download the latest version of libyaml from http://pyyaml.org/download/libyaml/

tar zxf yaml-0.1.4.tar.gz
cd yaml-0.1.4
./configure
make
make install

UPDATE2: BTW, you could still use rvm pkg and/or when reinstalling ruby make sure to enbale autolibs by \curl -L https://get.rvm.io | bash -s stable --rails --autolibs=enable

edited Apr 01 '13 at 07:23

answered Apr 01 '13 at 06:54

shayonj

900
9
14

1

For that didn't work. I even reinstalled rvm, turnend on autolibs etc. Finally manually downloaded and installed libyaml (like above) and installed the ruby with the libyaml option (see http://stackoverflow.com/a/12882906/651651). – wrtsprt Jul 23 '13 at 09:53

score 23 · Answer 2 · answered Aug 15 '14 at 16:03

23

A friend of mine had a similar problem on his mac.

brew install libyaml

ended up working for us and we were able to avoid a reinstall of ruby.

answered Aug 15 '14 at 16:03

random-forest-cat

33,652
11
120
99

This worked for 2 issues I was experiencing. Thanks. – Mark Hustad Mar 19 '16 at 16:23
3

This worked for me without needing to reinstall Ruby. In my case, `brew install libyaml` did nothing since it was already installed, but `brew reinstall libyaml` did the trick. – stephen.hanson Jun 30 '22 at 17:33
You should add a soultion for every platform not only MAC – disooqi May 04 '23 at 17:59

score 14 · Answer 3 · answered Jul 23 '14 at 05:58

14

If using homebrew, a temporary fix that worked for me was to run:

brew unlink libyaml && brew link libyaml

plus you may also need to run:

brew unlink openssl && brew link --force openssl

See this issue thread for more details: https://github.com/wayneeseguin/rvm/issues/2689

answered Jul 23 '14 at 05:58

Mike

987
11
13

After trying everything under the sun, this is what solve my issue. – Andrew Jan 14 '22 at 17:36

Please install libyaml and reinstall your ruby

3 Answers3

Linked