Unable to install Ruby 3.2.0

[mirnicscsongor]

So I run

rbenv install 3.2.0
rbenv global 3.2.0

and this is the error I get

To follow progress, use 'tail -f /var/folders/59/dgs3jq4n2fn03zlts84hnryc0000gn/T/ruby-build.20221227153230.4209.log' or pass --verbose
Downloading openssl-3.0.7.tar.gz...
-> https://dqw8nmjcqpjn7.cloudfront.net/83049d042a260e696f62406ac5c08bf706fd84383f945cf21bd61e9ed95c396e
Installing openssl-3.0.7...
Installed openssl-3.0.7 to /Users/csongormirnics/.rbenv/versions/3.2.0

Downloading ruby-3.2.0.tar.gz...
-> https://cache.ruby-lang.org/pub/ruby/3.2/ruby-3.2.0.tar.gz
Installing ruby-3.2.0...
ruby-build: using readline from homebrew

BUILD FAILED (macOS 13.1 using ruby-build 20221225)

Inspect or clean up the working tree at /var/folders/59/dgs3jq4n2fn03zlts84hnryc0000gn/T/ruby-build.20221227153230.4209.n1dfxN
Results logged to /var/folders/59/dgs3jq4n2fn03zlts84hnryc0000gn/T/ruby-build.20221227153230.4209.log

Last 10 log lines:
	Check ext/psych/mkmf.log for more details.
*** Fix the problems, then remove these directories and try again if you want.
Generating RDoc documentation
/private/var/folders/59/dgs3jq4n2fn03zlts84hnryc0000gn/T/ruby-build.20221227153230.4209.n1dfxN/ruby-3.2.0/lib/yaml.rb:3: warning: It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
uh-oh! RDoc had a problem:
cannot load such file -- psych

run with --debug for full backtrace
make: *** [rdoc] Error 1
rbenv: version `3.2.0' not installed

[hsbt]

To eliminate this warning, please install libyaml and reinstall your ruby.

You should install libyaml libraries and development header from package system like homebrew.

[vkononov]

I can confirm that on my Mac OS 13.1, I am able to install Ruby 3.2.0 while only having libyaml installed using brew. Do you have an older OS? That could definitely be the culprit.

[chrise86]

Yep, fully up to date (13.1) brand new Mac Studio.

[chrise86]

Managed to fix using this answer, although unsure why it was needed.

[aflansburg]

Managed to fix using this answer, although unsure why it was needed.

Thanks @chrise86

M1 MBP on 13.1 Here - I had to do the same after finding that libyaml-devel was not available. Crucial note, I had to set:

export CFLAGS="-Wno-error=implicit-function-declaration"

in order for this to work. The reason for that appeared to be related to compilers finding libffi which was apparent in this message:

libffi is keg-only, which means it was not symlinked into /opt/homebrew,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.

For compilers to find libffi you may need to set:
  export LDFLAGS="-L/opt/homebrew/opt/libffi/lib"
  export CPPFLAGS="-I/opt/homebrew/opt/libffi/include"

[rockotseng]

brew update && brew upgrade ruby-build this solves the issue at my end.

[alemens]

ruby-3.2.0/lib/yaml.rb require 'psych' so rbenv install 3.2.0 without libyaml is a failure

instead rbenv install 3.1.3 is a success

Environment

rbenv 1.2.0
Homebrew 3.6.16-97-ge76c55e
zsh 5.8.1 (x86_64-apple-darwin22.0)
macOS Ventura Version 13.1 (22C65) x86_64

[dcts]

how can you install libaml and psych?

[vkononov]

I had the same issue on CentOS, and running sudo dnf install libyaml-devel resolved the problem. libyaml alone was not enough. Needed to install libyaml-devel.

[Alibek-B]

thanks

[bl4ckouter]

Dude, I've been struggling with this for so long.
Thank you!

[joalbertg]

Steps I followed:

• rbenv install --list # not listed
• brew install libyaml-devel libyaml
• brew update && brew upgrade ruby-build
• rbenv install --list # Done!

[joelGarcia93]

you are the boss man!

[shileshv2]

I was installing ruby 3.x and got the error error: Can't build Ruby: make failed: . ./vm_opts.h

brew install libyml
frum install 3.2.2

Ruby was installed successfully after installing libyml,

[kcheart]

Without installing libyaml, I can not install 3.2.0.

steps work for me (I did not install libyaml-devel)

• brew install libyaml
• rbenv install 3.2.0

environment:

• rbenv 1.2.0
• Homebrew 3.6.17
• zsh 5.8.1 (x86_64-apple-darwin22.0)
• macOS Ventura Version macOS 13.1 (22C65) M1

[snfxgsx]

hey, how did you manage to install libyaml-devel ?

[vkononov]

He meant to say "Did not install libyaml-devel."

[kcheart]

sorry, my typo.
I did not install libyaml-devel.

[dcts]

I had the same issue, maybe useful to someone: Add psych to your gemfile, and specify the version to be below 4, because v4 has a bug.

Add to gemfile:

gem 'psych', '< 4'

Then run bundle install. That fixed it for me.

[kurko]

This seems unrelated to Ruby installation

[yaroslavrick]

In fedora I just need to update ruby-build:
cd ~/.rbenv/plugins/ruby-build
git pull
rbenv install --list
rbenv install 3.2.0

[yersel500]

Running this command before the installation of ruby 3.2.0 worked for me in Ubuntu 22.04:
sudo apt install git curl libssl-dev libreadline-dev zlib1g-dev autoconf bison build-essential libyaml-dev libreadline-dev libncurses5-dev libffi-dev libgdbm-dev

[gmcamposano]

Using Mint 21.1 can confirm that this worked. I just installed 3.2.1.

[edwardlayaodev]

thank you for this, having an issue on Pop OS 22.04, and this fixed it

[mathieujobin]

kept failing as well for me, it was hard to look at the log, because its running on docker build.
using ubuntu 20.04, installing libyaml-dev fixed the issue with 3.2.x

[nikos83]

On Catalina

• brew install libyaml
• rbenv install 3.2.1
  worked! Thanks!

[tnsasse]

If you run into this problem on Red Hat Enterprise Linux 9, you have to install the following packages:

• dnf install libyaml
• rpm -i https://mirror.stream.centos.org/9-stream/CRB/x86_64/os/Packages/libyaml-devel-0.2.5-7.el9.x86_64.rpm

Note this will install libyaml-devel from the CentOS Stream 9 repository, as it is not available on RHEL.

[ccastillop]

M2 with Sonoma,
The same error with libyaml and pyshc, which I've already installed with brew

This worked for me: TaKO8Ki/frum#126 (comment)

[mathieujobin]

How about 3.2.2 ? there is no reason to install 3.2.0 anymore ?