Issue #7344 has been updated by mrkn (Kenta Murata). > Could you try the following commands? This is my result: $ touch a $ install a a install: a and a are the same file $ echo $? 64 $ which install /usr/bin/install $ uname -a Darwin mrkn-mbp15.local 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64 ---------------------------------------- Bug #7344: gem pristine bigdecimal ???失æ???????¦ã????¾ã?? https://bugs.ruby-lang.org/issues/7344#change-34832 Author: hsbt (Hiroshi SHIBATA) Status: Feedback Priority: Normal Assignee: drbrain (Eric Hodel) Category: core Target version: 2.0.0 ruby -v: ruby 2.0.0dev (2012-11-13) [x86_64-darwin12.2.1] gem pristine bigdecimal ???å®?è¡?????????¨ä»¥ä¸???®ã?¨ã?©ã?¼ã????ºç???????¦è?½ã?¡ã?¦ã????¾ã????¾ã????? % gem pristine bigdecimal Restoring gems to pristine condition... Building native extensions. This could take a while... ERROR: While executing gem ... (Gem::Installer::ExtensionBuildError) ERROR: Failed to build gem native extension. /Users/hsbt/.rbenv/versions/2.0.0-dev/bin/ruby extconf.rb checking for labs() in stdlib.h... yes checking for llabs() in stdlib.h... yes creating Makefile make compiling bigdecimal.c linking shared-object bigdecimal.bundle make install /usr/local/Cellar/coreutils/8.19/libexec/gnubin/install -c -m 0755 bigdecimal.bundle /Users/hsbt/.rbenv/versions/2.0.0-dev/lib/ruby/gems/2.0.0/gems/bigdecimal-1.1.0/. /usr/local/Cellar/coreutils/8.19/libexec/gnubin/install: ???bigdecimal.bundle??? and ???/Users/hsbt/.rbenv/versions/2.0.0-dev/lib/ruby/gems/2.0.0/gems/bigdecimal-1.1.0/./bigdecimal.bundle??? are the same file make: *** [install-so] Error 1 ?????¬ã?§å??è¡??????¦ã??????????¯å½±??¿ã????ªã????®ã?§ã???????? OS ??¢ã??????????¼ã???????ªã?©ã?? gem pristine --all ???å®?è¡????????????? b ??§å?????æ¢ã?¾ã?£ã?¦ã????¾ã????®ã?§å?°ã?£ã?¦ã????¾ã????? -- http://bugs.ruby-lang.org/