Brew installation fails due to Ruby versioning?

Question

I am trying to install Linux Brew on Garuda Linux (Arch Linux based distro) but the install script fails with the following error:

==> Pouring portable-ruby-2.6.8.x86_64_linux.bottle.tar.gz
Error: Failed to install ruby 2.6.8!
Error: Failed to install Homebrew Portable Ruby and cannot find another Ruby 2.6.8!
If there's no Homebrew Portable Ruby available for your processor:
- install Ruby 2.6.8 with your system package manager (or rbenv/ruby-build)
- make it first in your PATH
- try again

Failed during: /home/linuxbrew/.linuxbrew/bin/brew update --force --quiet

I verified that Ruby exists on the system:

➜ ruby --version
ruby 3.0.3p157 (2021-11-24 revision 3fb7d2cadc) [x86_64-linux]

Is it complaining that Brew wants a particular version? I found one or two other users who posted the same error in recent days. The latter is also an Arch-based system and got the suggestion to install pkgconf, which I verified is installed on my system.

➜ pkgconf --version
1.8.0

I can't seem to figure out what the problem is ... any suggestions? I am new to Arch Linux based distributions.

Answer 1

Hopefully this helps someone else:

I ended up installing rbenv abd ruby-build following instructions here. Following that, I set up rbenv shell integration with rbenv init (for bash specifically, since brew install uses bash). Then I installed the required version of ruby using rbenv install command and then switched to it globally by running rbenv global. After this brew (finally!!) installed successfully and I switched back to the system version of ruby.

I hope I don't have to switch ruby versions each time I use Brew though ...