/tmp ❯ tar -zxf ~/Downloads/jruby-dist-9.4.2.0-bin.tar.gz

/tmp ❯ cd jruby-9.4.2.0 

/tmp/jruby-9.4.2.0 ❯ bin/jruby -v
jruby 9.4.2.0 (3.1.0) 2023-03-08 90d2913fda OpenJDK 64-Bit Server VM 17.0.4.1+1 on 17.0.4.1+1 +jit [arm64-darwin]

/tmp/jruby-9.4.2.0 ❯ bin/jruby -S gem install psych
Fetching psych-5.1.1-java.gem
  jar dependencies for psych-5.1.1-java.gemspec . . .
Installing gem 'ruby-maven' . . .
Fetching ruby-maven-3.3.13.gem
Fetching ruby-maven-libs-3.3.9.gem
Successfully installed ruby-maven-libs-3.3.9
Successfully installed ruby-maven-3.3.13
Parsing documentation for ruby-maven-libs-3.3.9
Installing ri documentation for ruby-maven-libs-3.3.9
Parsing documentation for ruby-maven-3.3.13
Installing ri documentation for ruby-maven-3.3.13
Done installing documentation for ruby-maven-libs, ruby-maven after 0 seconds
Parsing documentation for ruby-maven-3.3.13
Parsing documentation for ruby-maven-libs-3.3.9
Done installing documentation for ruby-maven, ruby-maven-libs after 0 seconds

using maven for the first time results in maven
downloading all its default plugin and can take time.
as those plugins get cached on disk and further execution
of maven is much faster then the first time.

2023-10-11T14:39:15.073+01:00 [main] WARN FilenoUtil : Native subprocess control requires open access to the JDK IO subsystem
Pass '--add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.base/java.io=ALL-UNNAMED' to enable.
      org.snakeyaml:snakeyaml-engine:2.7:compile
Successfully installed psych-5.1.1-java
Parsing documentation for psych-5.1.1-java
Installing ri documentation for psych-5.1.1-java
Done installing documentation for psych after 0 seconds
1 gem installed

/tmp/jruby-9.4.2.0 ❯ bin/jruby -S gem install psych
NameError: cannot load (ext) (org.jruby.ext.psych.PsychLibrary)
          load_ext at org/jruby/ext/jruby/JRubyUtilLibrary.java:216
            <main> at /private/tmp/jruby-9.4.2.0/lib/ruby/gems/shared/gems/psych-5.1.1-java/lib/psych.rb:7
           require at org/jruby/RubyKernel.java:1057
           require at /private/tmp/jruby-9.4.2.0/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:85
         load_yaml at /private/tmp/jruby-9.4.2.0/lib/ruby/stdlib/rubygems.rb:610
         load_file at /private/tmp/jruby-9.4.2.0/lib/ruby/stdlib/rubygems/config_file.rb:346
        initialize at /private/tmp/jruby-9.4.2.0/lib/ruby/stdlib/rubygems/config_file.rb:189
               new at org/jruby/RubyClass.java:904
  do_configuration at /private/tmp/jruby-9.4.2.0/lib/ruby/stdlib/rubygems/gem_runner.rb:71
               run at /private/tmp/jruby-9.4.2.0/lib/ruby/stdlib/rubygems/gem_runner.rb:33
            <main> at /private/tmp/jruby-9.4.2.0/bin/jgem:21
              load at org/jruby/RubyKernel.java:1091
            <main> at /private/tmp/jruby-9.4.2.0/bin/gem:4