how to solve "ruby installation is missing psych" error?

Question

I used rvm to install ruby 1.9.3. even though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:

It seems your ruby installation is missing psych (for YAML output). To eliminate this warning, please install libyaml and reinstall your ruby.

I use Mac os X 10.7 (Lion).

Have you tried to install libyaml following these instructions: http://pyyaml.org/wiki/LibYAML ? — sailor, Feb 24 '12 at 16:25
Are you using homebrew? Try `brew doctor`. Does it list a problem with libyaml link? — Stoutie, Mar 02 '14 at 08:18
Mac users: `rm -rf /usr/local/lib/ruby/gems/ && brew reinstall ruby` as stated in the official [homebrew-core](https://github.com/Homebrew/homebrew-core) Gtihub resolved [issue](https://github.com/Homebrew/homebrew-core/issues/11636#issuecomment-290892884) — Travis Clarke, May 07 '17 at 04:51

score 237 · Accepted Answer · edited Oct 02 '17 at 13:45

237

In my case

rvm pkg install libyaml

and

rvm reinstall ruby-1.9.3-p125

solved the problem.

For people using Ubuntu, make sure that libtool is installed prior to the steps above:

sudo apt-get install libtool

For macOS users (with homebrew):

rm -rf /usr/local/lib/ruby/gems/ && brew reinstall ruby

edited Oct 02 '17 at 13:45

sepehr

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answered Mar 01 '12 at 03:27

peterpengnz

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You actually mean: `rvm package install libyaml` – johncblandii May 08 '12 at 16:39
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No, he meant `rvm pkg install libyaml`. From `rvm usage`: `pkg :: Install a dependency package {readline,iconv,zlib,openssl}`. – jordanpg May 09 '12 at 20:45
I think it depends on what version of rvm you use. In rvm 1.6.9 it is `package`. – Vanuan Jul 26 '12 at 19:06
didn't help for job in Jenkins. – Paul Sep 11 '12 at 08:36
9

After running `rvm pkg install libyaml` it recommends to reinstall all rubies with `rvm reinstall all --force`. It might be useful if you have more than one. – Haralan Dobrev Nov 10 '12 at 15:36
Should you use ruby-head or explicity write the version number? – Martin Josefsson Nov 22 '12 at 19:48
You might have to do `sudo rvm pkg install libyaml` if you get errors such as `Error running 'tar xmzf /Users/Kieran/.rvm/archives/yaml-0.1.4.tar.gz -C /Users/Kieran/.rvm/src ', please read /Users/Kieran/.rvm/log/yaml/extract.log`. This is because for some reason it doesn't have permissions to remove folders and replace them. – Kieran Senior Feb 13 '13 at 10:59
7

Had to do `rvm reinstall 1.9.3 --with-libyaml-dir=/home/rails/.rvm/usr` as suggested in http://serverfault.com/questions/442150/how-to-fix-ruby-installation-is-missing-psych-for-yaml-output-on-centos – pcv May 28 '13 at 02:13
Sometimes a question deserves a question, not an assumptive answer, to get at the root problem. In my case, I got a very similar error when doing `gem install jekyll`. My rvm commands were also giving me errors. I had recently upgraded to Mavericks. I think that broke some of the brew links, including libyaml. I did also reinstall rvm and ruby as well, but I'm not convinced that was an essential part of the solution. I believe resolving all the `brew doctor` issues, especially the `brew link --overwrite libyaml` fixed it for me. – Stoutie Mar 02 '14 at 08:14
rvm dpkg depricated. Use rvm autolibs – twinturbotom Jun 06 '14 at 12:43
1

thx :) but `rvm pkg` was deprecated, `rvm autolibs` was recommended :) – Fu Xu Feb 27 '15 at 15:12
I instead allowed rvm to handle everything and did `rvm requirements`. That solved the problem. – mrudult Sep 28 '16 at 15:49
For version 3.0.0 `rvm reinstall ruby-3.0.0-p0` – Tharindu Madushanka Aug 19 '21 at 08:43
No binary rubies available for: osx/12.6/arm64/ruby-1.9.3-p125 – Neeraj Joshi Mar 03 '23 at 07:09

score 27 · Answer 2 · answered Jun 09 '12 at 05:21

27

brew install libyaml
rvm reinstall 1.9.3

Is what worked for me (on Snow Leopard).

answered Jun 09 '12 at 05:21

Catharz

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I had to do this as well. rvm pkg install libyaml didn't do it for me. – stringo0 Feb 21 '13 at 21:54
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I only needed the first line, then trying again worked (I'm using rbenv) – stevec Feb 21 '23 at 09:39

Gizmomogwai · Answer 3 · 2012-04-03T19:14:46.760

22

for ubuntu and rvm

sudo apt-get install libtool
rvm pkg install libyaml
rvm reinstall 1.9.3

worked

edited Apr 03 '12 at 19:14

answered Apr 03 '12 at 19:05

Gizmomogwai

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I had to 'rvm uninstall all' before installing libyaml. That's the only way the error cleared – Sunil Gowda Nov 16 '12 at 01:05

matt · Answer 4 · 2012-09-11T20:35:18.237

20

If not using rvm, but rather you are building and installing ruby 1.9.3 from scratch — for example, you're managing your ruby versions with rbenv — you must install libyaml first. Get it from http://pyyaml.org/; at the moment, the file you want is http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz. Open the tarball and cd into the resulting folder. Then:

./configure --prefix=/usr/local
make
sudo make install

You are now ready to build ruby. Download ruby from http://ftp.ruby-lang.org/pub/ruby/. Open the tarball and cd into the resulting folder. Now:

./configure --prefix=/wherever/you/want/it/to/go
make
make install

(Or possibly sudo make install, depending on where you're putting it.) If using rbenv, you'll know it has worked if you switch to rbenv global 1.9.3-p194 (or whatever your version is called) and gem --version works without a warning. That worked for me on Mac OS X 10.6.8. (Update: I just tried this on Mac OS X 10.8.1 and it seems to have worked fine there too.)

edited Sep 11 '12 at 20:35

answered Sep 11 '12 at 01:11

matt

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what should gem --version output? I installed Ruby 1.9.3-p327 but gem --version outputs 1.8.23 (not sure if that's related) and when I do bundle update, it strangely says that some gems are requiring => 1.9.2 http://stackoverflow.com/questions/14116083/1-9-3-installed-error-message-factory-girl-requires-ruby-version-1-9-2 – Leahcim Jan 02 '13 at 02:06
your `gem --version` sounds correct, but maybe you've got your path munged because of former use of rvm – matt Jan 02 '13 at 02:15
4

And if you must install yaml without sudo, specify a prefix other than `/usr/local` when configuring yaml, then configure ruby with `--with-opt-dir=/path/to/yaml/prefix --with-yaml --prefix=/path/to/ruby/prefix` – Chadwick Apr 03 '13 at 19:46
I know this is over a year old, but the question was about an error with RVM. How could starting with "If not using rvm" be appropiate? – Peter Degen-Portnoy Apr 04 '14 at 15:03

score 9 · Answer 5 · answered Jul 26 '12 at 19:40

9

In my case the solution was to add the psych gem to the Gemfile.

answered Jul 26 '12 at 19:40

Vanuan

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orkoden · Answer 6 · 2017-05-08T09:34:50.333

6

If you have installed ruby on macOS with homebrew, try this solution.

rm -rf /usr/local/lib/ruby/gems/ && brew reinstall ruby

Note that this will get rid of all installed gems. Best save a list of installed gems with gem list before you run this.

edited May 08 '17 at 09:34

answered May 08 '17 at 08:50

orkoden

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But `gem list` is what causes the error in the first place (for me). – orome Oct 03 '17 at 12:35

score 6 · Answer 7 · edited Oct 23 '12 at 14:22

6

I had this problem. libyaml wouldn't compile. It turns out I was missing libtool.

yum install libtool
yum install libyaml (or rvm pkg install libyaml)
rvm reinstall 1.9.3

That solved my problem.

edited Oct 23 '12 at 14:22

Ish

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answered Mar 30 '12 at 19:14

RubyRedGrapefruit

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No package libtool available. Nothing to do. – Paul Sep 11 '12 at 08:34
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centos can't yum install libtool? not believe it.. are u using non-redhat based system and need to apt-get? – phil88530 Nov 03 '12 at 09:08
@phil88530 old version of CentOS can be more stupid than you think – Dennis C Nov 22 '12 at 07:04
@DennisCheung oh ok, never played with an old one – phil88530 Nov 22 '12 at 10:27

score 5 · Answer 8 · answered Apr 30 '13 at 04:54

5

$ brew doctor
$ brew link libyaml

answered Apr 30 '13 at 04:54

Lane

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Resolving all `brew doctor` issues fixed it for me. I got an error very similar to the questioner's error while trying to `gem install jekyll`. All commands through rvm were giving errors too. The underlying and not so obvious problem is that homebrew, I'm assuming the means by which rvm installs stuff, was having issues. I had recently upgraded to Mavericks on Mac OS. In my case, resolving all the `brew doctor` issues eliminated every single error message. Now everything is working smoothly. – Stoutie Mar 02 '14 at 08:08

adamo · Answer 9 · 2013-05-03T14:08:25.653

4

I reinstalled ruby 1.9.3 with libyaml support:

rvm reinstall 1.9.3 --with-libyaml

I made sure that I would use 1.9.3 before installing psych:

rvm use 1.9.3

I installed psych:

gem install psych

edited May 03 '13 at 14:08

answered May 03 '13 at 12:03

adamo

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score 4 · Answer 10 · answered Jul 25 '13 at 18:52

4

I got this fixed finally. The issue was that even though I installed libyaml with brew, it was never linked. I had to remove a conflicting header file and then brew link libyaml.

answered Jul 25 '13 at 18:52

Michael

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score 4 · Answer 11 · answered May 23 '14 at 11:39

4

Installing ruby with rvm for mac osx, use autolibs to install libyaml and first uninstalling libyaml helps.

This worked for me:

brew uninstall libyaml
rvm autolibs enable
rvm reinstall ruby-2.1.1

answered May 23 '14 at 11:39

user33302

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Thanks @user33302. Above solution also worked for me on Mac OS EI CAPITON. – Sandeep Ahuja May 24 '16 at 06:02

user761552 · Answer 12 · 2012-06-22T03:28:13.980

3

I had the same problem (Lion 10.7.4), and fixed it by upgrading rvm then reinstalling ruby

1) upgrade rvm https://rvm.io//rvm/install/

curl -L https://get.rvm.io | bash -s stable --ruby

2) Then use rvm to reinstall ruby 1.9.3 (which had been previously installed with the earlier version of rvm)

rvm reinstall 1.9.3

edited Jun 22 '12 at 03:28

answered Jun 21 '12 at 23:11

user761552

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score 3 · Answer 13 · answered Nov 29 '12 at 16:21

3

This is what worked for me on Ubuntu:
- installing libyaml-dev (sudo apt-get install libyaml-dev)
- installing rvm + ruby 1.9.3

answered Nov 29 '12 at 16:21

Luc

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score 2 · Answer 14 · answered Oct 16 '12 at 03:07

None of these answers worked for me.

I found my answer on https://github.com/sstephenson/ruby-build/issues/119 I am on Centos 6.3 Virtual Machine.

YOU MUST install libyaml before you install ruby. IF you ALREADY installed ruby you must get rid of the files before compiling source again!!!

# cd to your ruby source location
rm -rf /usr/local/lib/ruby # clean out ruby files
./configure
make && make install
gem -v # check if error is fixed

score 2 · Answer 15 · answered Nov 16 '12 at 22:08

I built the libyaml files separately from source and installed them in /usr/local/lib. The ruby that RVM created still did not see them, and rather than muck with the makefile or the system LD_LIBRARY_PATH I just copied /usr/local/lib/libyaml* to ~/.rvm/rubies/ruby-1.9.3-p327/lib/

That quieted the warning.

score 2 · Answer 16 · answered Nov 22 '12 at 05:25

On CentOS 6.3 none of the above worked. However installing libyaml from source before installing ruby resolved the problem.

$ wget http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz
$ tar xzvf yaml-0.1.4.tar.gz
$ cd yaml-0.1.4
$ ./configure --prefix=/usr/local
$ make
$ sudo make install

and then

rvm install 1.9.3
gem install rails

score 2 · Answer 17 · answered Apr 21 '13 at 19:08

I tried all of these answers and still wasn't able to get it working. I installed libyaml with homebrew and then installed Ruby 1.9.3 and 2.0.0 with rvm. Each time it complained that I was missing psych (libyaml). But trying to install libyaml told me it was already installed. Rinse, repeat. Urgh.

Finally, what I did was to uninstall libyaml. Then I enabled autolibs in rvm, which (at least in OSX) allows rvm to install and manage dependencies more directly. Now when I installed the Rubies, rvm was able to install libyaml and recognize that it was in the right spot.

So if you've tried all of the other options, try actually removing libyaml and then installing your Rubies. It's count-intuitive from the error messages, but that's what finally worked for me.

You don't need libyaml: you need libyaml-dev, which is what rvm installs for you with --autolibs — Confusion, Jun 19 '13 at 06:44

score 2 · Answer 18 · answered Jul 08 '15 at 23:33

2

If you are building ruby from source (I built 1.9.3 on Fedora 20), you will need this before you do the configure/make to build ruby:

yum install libyaml-devel

(in addition to yum install libyaml.) Similar to Francis's answer using rpmforge above.

answered Jul 08 '15 at 23:33

Don Law

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Also confirmed on Centos 5.6 – marcovtwout Dec 09 '15 at 16:57

score 2 · Answer 19 · edited Mar 05 '12 at 12:59

sudo port install libyaml # or brew install libyaml
rvm get latest
rvm pkg install iconv
rvm pkg install openssl
rvm reinstall 1.9.3 --with-openssl-dir=~/.rvm/usr --with-iconv-dir=~/.rvm/usr

curl -OL http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
curl -OL http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem

gem install linecache19-0.5.13.gem ruby-debug-base19-0.11.26.gem -- --with-ruby-include=$rvm_path/src/ruby-1.9.3-p125/
gem install ruby-debug19

rvm reload

reload your .rvmrc (cd out, cd in)

bundle

score 1 · Answer 20 · answered Oct 25 '12 at 16:42

I had the same problem (Cent OS 5.7), none of the above solutions worked to me.

// My console warning
/usr/local/rvm/rubies/ruby-1.9.3-p286/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.

After doing several re-installs, I realized it's looking for yaml in ruby version of 1.9.1 instead of 1.9.3. So i downgraded

// obviously after installing `libyaml`
rvm remove all
rvm install 1.9.1
rvm use 1.9.1 --default

And it worked 8D!

score 1 · Answer 21 · answered Jan 25 '13 at 17:48

I'm using

rvm 1.16.20 (version) by Wayne E. Seguin , Michal Papis [https://rvm.io/]

and also got the following error during bundle install

.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/yaml.rb:56:in `': It seems your ruby installation is missing psych (for YAML output). To eliminate this warning, please install libyaml and reinstall your ruby.

Here are three different ways to resolve this error w/o having to gem install psych

export LD_LIBRARY_PATH=/usr/local/lib

alter /etc/ld.so.conf

sudo su - root
echo /usr/local/lib64 >> /etc/ld.so.conf
echo /usr/local/lib >> /etc/ld.so.conf
ldconfig

Fix rvm ruby 1.9.3 installation via

patch .rvm/scripts/functions/manage/ruby < ruby-1.9.3-LDFLAGS.patch
rvm uninstall ruby-1.9.3-p194
export LDFLAGS='-L /usr/local/lib64 -L/usr/local/lib -Xlinker -R/usr/local/lib64 -Xlinker -R/usr/local/lib'
rvm install ruby-1.9.3-p194 --disable-binary
grep configure_args .rvm/src/ruby-1.9.3-p194/config.log # to confirm LDFLAG

    $ diff  -c .rvm/{src/rvm/,}scripts/functions/manage/ruby
    *** .rvm/src/rvm/scripts/functions/manage/ruby  2012-11-10 06:28:14.000000000 +0000
    --- .rvm/scripts/functions/manage/ruby  2013-01-25 17:18:00.000000000 +0000
    ***************
    *** 106,123 ****
              # when relative is in effect libyaml is installed in ruby itself so it will be moved with ruby
              prefix_path="${rvm_rubies_path}/${rvm_ruby_string}" libyaml

    !         __rvm_update_configure_env CFLAGS="-I${rvm_rubies_path}/${rvm_ruby_string}/include"
    !         __rvm_update_configure_env LDFLAGS="-L${rvm_rubies_path}/${rvm_ruby_string}/lib"
              if [[ -d "${rvm_rubies_path}/${rvm_ruby_string}/lib64" ]]
    !         then __rvm_update_configure_env LDFLAGS="-L${rvm_rubies_path}/${rvm_ruby_string}/lib64"
              fi
            else
              libyaml_installed || libyaml # Installs libyaml

    !         __rvm_update_configure_env CFLAGS="-I${rvm_path}/usr/include"
    !         __rvm_update_configure_env LDFLAGS="-L${rvm_path}/usr/lib"
              if [[ -d "${rvm_path}/usr/lib64" ]]
    !         then __rvm_update_configure_env LDFLAGS="-L${rvm_path}/usr/lib64"
              fi
            fi

    --- 106,123 ----
              # when relative is in effect libyaml is installed in ruby itself so it will be moved with ruby
              prefix_path="${rvm_rubies_path}/${rvm_ruby_string}" libyaml

    !         __rvm_update_configure_env CFLAGS="-I${rvm_rubies_path}/${rvm_ruby_string}/include ${CFLAGS}"
    !         __rvm_update_configure_env LDFLAGS="-L${rvm_rubies_path}/${rvm_ruby_string}/lib ${LDFLAGS}"
              if [[ -d "${rvm_rubies_path}/${rvm_ruby_string}/lib64" ]]
    !         then __rvm_update_configure_env LDFLAGS="-L${rvm_rubies_path}/${rvm_ruby_string}/lib64 ${LDFLAGS}"
              fi
            else
              libyaml_installed || libyaml # Installs libyaml

    !         __rvm_update_configure_env CFLAGS="-I${rvm_path}/usr/include ${CFLAGS}"
    !         __rvm_update_configure_env LDFLAGS="-L${rvm_path}/usr/lib ${LDFLAGS}"
              if [[ -d "${rvm_path}/usr/lib64" ]]
    !         then __rvm_update_configure_env LDFLAGS="-L${rvm_path}/usr/lib64 ${LDFLAGS}"
              fi
            fi

I've confirmed this patch is not needed if you are using the latest stable rvm version 1.18.4 — victorv, Jan 28 '13 at 21:59

score 1 · Answer 22 · edited Apr 18 '13 at 20:41

I also struggled with the same failures with rvm install ruby-2.0.0 for many, MANY hours. I had tried all the different methods to install libyaml; wget source, yum and rvm. I also tried all of the different approaches listed in similar threads. Because I tried all the different methods, I had multiple installations and locations of libyaml.

RVM is perfectly capable of installing the necessary dependencies in ~/.rvm. Simply removing the libyaml files from non-RVM install fixed this issue for me:

sudo rm /usr/local/lib/libyaml*.*

rvm reinstall ruby-2.0.0-p0

Works!

Francis Trujillo · Answer 23 · 2013-07-07T16:08:23.570

NON-RVM ruby install method.

% uname -a
Linux localhost.localdomain 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC 2013  x86_64 x86_64 x86_64 GNU/Linux

% cat /etc/redhat-release
CentOS release 6.4 (Final)

% wget http://apt.sw.be/redhat/el5/en/x86_64/dag/RPMS/rpmforge-release-0.3.6-1.el5.rf.x86_64.rpm
% sudo rpm -K rpmforge-release-0.3.6-1.el5.rf.*.rpm"
% sudo rpm -ivh rpmforge-release-0.3.6-1.el5.rf.*.rpm"

DISABLE rpmforge by editing this file and set enabled=0 % sudo vi /etc/yum.repos.d/rpmforge.repo

% grep rpmforge ~/.aliases
alias rpmforge "sudo yum --disablerepo='*' --enablerepo='rpmforge'"

% rpmforge install libyaml libyaml-devel

% sudo yum list installed | grep libyaml
libyaml.x86_64          0.1.4-1.el5.rf  @rpmforge                               
libyaml-devel.x86_64    0.1.4-1.el5.rf  @rpmforge

The libyaml-devel is the key.

% tar zxvf ruby-1.9.3-p448.tar.gz
% cd ruby-1.9.3-p448
% ./configure -prefix=$HOME/ruby-1.9.3-p448
% make ; make install
% cd $HOME; ln -s ./ruby-1.9.3-p448 ruby

Update your path and source .cshrc

% echo $PATH
/home/francis/ruby/bin:/usr/sbin:/home/francis/bin:/home/francis/jdk1.7.0_25/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin

% which ruby
/home/francis/ruby/bin/ruby

% gem update --system

Set your GEM_HOME in .cshrc and source

% echo $GEM_HOME
% /home/francis/ruby/lib/ruby/gems

% gem install mysql2 pg ruby-debug-ide rails capistrano capistrano-ext passenger

score 1 · Answer 24 · answered Sep 20 '17 at 17:42

I was having this error and noticed I had different versions of Ruby installed with HomeBrew, along with many gems that I no longer used. So did a full clean up like this:

$ brew remove --force ruby # remove all versions installed
$ sudo rm -rf /usr/local/lib/ruby # remove all gems and leftover files
$ brew install ruby
$ gem install bundler
$ bundle install

If you don't use a Gemfile, make sure you know which gems to reinstall.

score 1 · Answer 25 · answered Oct 03 '17 at 14:32

1

In my case all I needed to do was

rm -rf /usr/local/lib/ruby/gems/2.4.0/gems/psych-2.2.4
rm -rf /usr/local/lib/ruby/gems/2.4.0/extensions/x86_64-darwin-16/2.4.0/psych-2.2.4

Now, FWIW, gem list includes

psych (2.2.4, default: 2.2.2)

answered Oct 03 '17 at 14:32

orome

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I am on macOS Sierra, and this worked for me. It is the same solution reported in this GitHub issue [here](https://github.com/Homebrew/homebrew-core/issues/11636) Try this solution first as it is much simpler and less drastic than the others in this page. – mljrg Dec 30 '17 at 00:16

vicentesantos · Answer 26 · 2020-05-20T17:54:25.590

Ubuntu
Using RVM
Reason: Conflicting Psych gem versions between ruby 2.4.4 and ruby 2.5.1

I spent a few hours trying to get my error to go away and none of the replies here suited my case, so I thought I would post how I solved it...

In my case when I ran gem list | grep psych, I had the following output: psych(default: 3.1.0, default: 3.0.2).

Apparently since version 2.5.0, ruby depends on the newer version of psych (3.1.0) and having both set as default was messing up everything. Notice that I never ended up finding out why those were both set as default - I completely wiped out rvm and ruby versions from my computer due to this.

So in order to remove the older version (3.0.2) from being set as default, head to ~/.rvm/gems/ruby-x.x.x@global/specifications/default. If you run ls | grep psych it will return both versions of the gem here. If you want to maintain 3.1.0 as default just run mv psych-3.0.2.gemspec ../ and then try running gemlist to make sure it is listing only one version as default now...

tl;dr cd /.rvm/gems/ruby-x.x.x@global/specifications/default mv psych-3.0.2 ../

Hope this helps someone!

score 1 · Answer 27 · answered Apr 05 '23 at 13:20

For problems with rbenv on ubuntu 22, I had to installl libtool and libffi-dev through apt, and compile the yaml package (Thanks to Dmitry for his answer):

sudo apt install libtool
sudo apt install libffi-dev

wget https://pyyaml.org/download/libyaml/yaml-0.2.5.tar.gz
tar zxf yaml-0.2.5.tar.gz
cd yaml-0.2.5
./configure
make
make install

After that, I ran rbenv install 3.2.2 again and it worked.

score 0 · Answer 28 · answered Jun 10 '12 at 21:50

On Snow Leopard, the solution by Catharz did not work for me. This solution, however, did:

brew install libyaml
rvm get head
rvm reinstall 1.9.3  --with-gcc=clang

(The rvm reinstall gave me a warning about clang not having the option "--with-libyaml" but it solved the error message regardless.)

score 0 · Answer 29 · answered Jun 26 '12 at 09:46

0

This worked for me at least on Ubuntu 10.04

$ sudo apt-get install libtool

$ rvm reinstall 1.9.3

answered Jun 26 '12 at 09:46

Abhay PS

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score 0 · Answer 30 · edited Nov 12 '12 at 15:04

0

On Solaris:

# sudo crle -64 -l /usr/local/lib

to add /usr/local/lib to the shared library search path (see man crle)

edited Nov 12 '12 at 15:04

John Conde

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answered Nov 12 '12 at 14:39

edx

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This question about os x. – zishe Jun 28 '14 at 05:12

score 0 · Answer 31 · edited Jun 20 '20 at 09:12

When I switch from 64 bit to 32 bit on Snow Leopard 10.6.8, I had reinstalled ruby (used rvm) to run on 32bit and met the same problem. So I just 'cleanup' all thing that cached by rvm before and problems solved. Hope this tip can help someone.

rvm cleanup all

rvm install ruby_version_here //(This way, rvm will also re-download newest yaml).

BTW, if you still meet this problem, I think you can try:

gem install psych

score 0 · Answer 32 · answered Mar 19 '13 at 23:58

For those with Mountain Lion and RVM version >= 1.18.x

RVM ships with this new tool that is used as a flag when installing ruby versions. It's called autolibs.

I got rid of this psych problem by doing the following:

rvm reinstall ruby-1.9.3-p392 --autolibs=3

Read the help text BEFORE by doing:

rvm help autolibs

Cool.

score 0 · Answer 33 · answered Sep 30 '14 at 09:09

I had similar problem after OSX upgrade, this what solves my problem:

   brew rm libyaml
   brew cleanup libyaml
   brew install libyaml
   brew rm openssl
   brew cleanup openssl
   brew install openssl
   rvm remove *your version*
   rvm install *latest version*

found here

score 0 · Answer 34 · answered Oct 15 '15 at 11:31

0

rvm pkg install libyaml
$LIBYAML_PATH will be the path where RVM installs the upated yaml
rvm get stable
rvm reinstall all --force --with-libyaml-dir=$LIBYAML_PATH

answered Oct 15 '15 at 11:31

hamdiakoguz

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score 0 · Answer 35 · answered Nov 18 '20 at 07:41

I've been facing the same issue. I'm using MacPorts with rbenv installed!

What I did:

sudo port install ruby26
sudo port select --set ruby ruby26 (this effectively takes macOS default ruby installation out of game)
removed all gems from ~/.gem/ruby/2.6.0/gems which caused errors while invoking the gem command
run gem pristine commands for all gems listed by gem list (the exact commands are part of the warnings)
finally gem update --user-install

how to solve "ruby installation is missing psych" error?

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