pikでGEM_HOMEを設定する。 ~/.pik/config.yml -------------------------------------------------- "187: ruby 1.8.7 (2011-06-30 patchlevel 352) [i386-mingw32]": :path: !ruby/object:Pathname path: /パス/パス/.pik/rubies/Ruby-187-p352/bin :gem_home: !ruby/object:Pathname path: /パス/パス/.pik/rubies/Ruby-187-p352/lib/ruby/gems/1.8 "192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]": :path: !ruby/object:Pathname path: /パス/パス/.pik/rubies/Ruby-192-p290/bin :gem_home: !ruby/object:Pathname path: /パス/パス/.pik/rubies/Ruby-192-p290/lib/ruby/gems/1.9.1