gem install couchbase fails

Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Duplicate
Affects Version/s: 1.2.0.z.beta
Fix Version/s: None
Component/s: None
Security Level: Public
Labels:
None

Description

me$ gem install couchbase --pre
Building native extensions. This could take a while...
ERROR: Error installing couchbase:
ERROR: Failed to build gem native extension.

/Users/me/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
extconf.rb:25:in `block in <main>': uninitialized constant RbConfig::ARCHFLAGS (NameError)
from extconf.rb:24:in `each'
from extconf.rb:24:in `<main>'

Gem files will remain installed in /Users/me/.rvm/gems/ruby-1.9.3-p194/gems/couchbase-1.2.0.z.beta for inspection.
Results logged to /Users/me/.rvm/gems/ruby-1.9.3-p194/gems/couchbase-1.2.0.z.beta/ext/couchbase_ext/gem_make.out