Why are gems installed in a directory with a different Ruby version than I’m running?

by

Note that the following is also for all later Ruby versions as of this writing, not just 1.9.2.

Per the 1.9.2 release announcement:

Standard library is installed in /usr/local/lib/ruby/1.9.1

This version is a “library compatible version.” Ruby 1.9.2 is almost 1.9.1 compatible, so the library is installed in the 1.9.1 directory.

Even though it is installed in a differently-numbered directory, it is using 1.9.2. RubyGems can show all the directories it’s using via gem env.

This ensures that a set of installed gems is only used by versions that they can actually run with (especially due to compiled C extensions), and that when upgrading to a newer, but “library compatible”, version, one doesn’t have to reinstall all gems.

More Related Contents:

  1. How to remove RVM (Ruby Version Manager) from my system
  2. Ruby Gem install Json fails on Mavericks and Xcode 5.1 – unknown argument: ‘-multiply_definedsuppress’
  3. How do I update Ruby Gems from behind a Proxy (ISA-NTLM)
  4. How to make –no-ri –no-rdoc the default for gem install?
  5. Meaning of tilde-greater-than (~>) in version requirement?
  6. Can’t install gems on OS X “El Capitan”
  7. What does tilde-greater-than (~>) mean in Ruby gem dependencies? [duplicate]
  8. Why are we installing Ruby 1.9.2/1.9.3 gems into a 1.9.1 folder?
  9. You have already activated X, but your Gemfile requires Y
  10. How can I install a local gem?
  11. Adding a directory to $LOAD_PATH (Ruby)
  12. Installing RubyGems in Windows
  13. How to avoid “cannot load such file — utils/popen” from homebrew on OSX
  14. Unresolved specs during Gem::Specification.reset:
  15. How do you downgrade rubygems?
  16. Installing Jekyll without root
  17. find_spec_for_exe’: can’t find gem bundler (>= 0.a) (Gem::GemNotFoundException)
  18. Ignoring GEM because its extensions are not built
  19. ERROR: While executing gem … (Errno::EPERM) Operation not permitted [duplicate]
  20. ERROR: While executing gem … (Gem::FilePermissionError)
  21. List of installed gems?
  22. Why does “compass watch” say it cannot load sass/script/node (LoadError)?
  23. Check for Ruby Gem availability
  24. how to install gems without sudo
  25. Rubygems: How do I add platform-specific dependency?
  26. ERROR: Error installing ffi: ERROR: Failed to build gem native extension
  27. Ruby gem for finding timezone of location [closed]
  28. Functional code examples in ruby
  29. Ruby : How to write a gem? [closed]
  30. How to install therubyracer gem on 10.10 Yosemite?

Leave a Comment