Issue #1178 has been updated by Nobuyoshi Nakada. Status changed from Open to Feedback I couldn't reproduce it, with or without sudo. $ gem19 install ffi WARNING: Installing to ~/.gem since /usr/lib/ruby/gems/1.9.1 and /usr/bin aren't both writable. WARNING: You don't have /home/nobu/.gem/ruby/1.9.1/bin in your PATH, gem executables will not run. Building native extensions. This could take a while... Successfully installed ffi-0.2.0 1 gem installed Installing ri documentation for ffi-0.2.0... Updating class cache with 1311 classes... Installing RDoc documentation for ffi-0.2.0... ---------------------------------------- http://redmine.ruby-lang.org/issues/show/1178 ---------------------------------------- http://redmine.ruby-lang.org