ruby - Can't install cmake - Failed to build gem native extension -

ruby - Can't install cmake - Failed to build gem native extension -

i'm trying install cmake , rugged gems. ruby 193 , devkit installed correspondingly version. modified scheme path , installed devkit.

now seek run gem install cmake, , i'm getting error:

> gem install cmake temporarily enhancing path include devkit... building native extensions. take while... error: error installing cmake: error: failed build gem native extension. c:/ruby193/bin/ruby.exe extconf.rb *** extconf.rb failed *** not create makefile due reason, lack of necessary libraries and/or headers. check mkmf.log file more details. may need configuration options. provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=c:/ruby193/bin/ruby extconf.rb:5:in `chdir': no such file or directory - c:/ruby193/lib/ruby/gems/1.9.1/gems/ oent) extconf.rb:5:in `<main>' gem files remain installed in c:/ruby193/lib/ruby/gems/1.9.1/gems/cmake-2.8.7 in results logged c:/ruby193/lib/ruby/gems/1.9.1/gems/cmake-2.8.7/ext/cmake/gem_make.out

i don't know do, used newer ruby before , problem same. can do?

ruby