Ich versuche, gem json zu installieren und erhalte einen Fehler für json.

Ich renne

Windows 8.1 (64 Bit) Ruby: ruby 1.9.3p545 (24.02.2014) [i386-mingw32]gem: 1.8.2

D:\GIT\calabash>gem install json -v '1.8.3'
Building native extensions.  This could take a while...
The system cannot find the path specified.
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb
creating Makefile
Gem files will remain installed in C:/Ruby193/lib/ruby/gems/1.9.1/gems/json-1.8.3 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/gems/json-1.8.3/ext/json/ext/generator/gem_make.out

D:\GIT\calabash>