问无法在Windows中安装JSONGEM？

EN

d:\source\my_project>gem install json -v '1.6.3'
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing json:
        ERROR: Failed to build gem native extension.

    C:/Ruby200/bin/ruby.exe extconf.rb
creating Makefile

make
generating parser-i386-mingw32.def
compiling parser.c
In file included from parser.rl:1:0:
../fbuffer/fbuffer.h:129:13: warning: 'fbuffer_append_long' defined but not used [-Wunused-function]
../fbuffer/fbuffer.h:136:17: warning: 'fbuffer_dup' defined but not used [-Wunused-function]
../fbuffer/fbuffer.h:149:14: warning: 'fbuffer_to_s' defined but not used [-Wunused-function]
../fbuffer/fbuffer.h:90:13: warning: 'fbuffer_append_str' defined but not used [-Wunused-function]
linking shared-object json/ext/parser.so

make install
/usr/bin/install -c -m 0755 parser.so C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.6.3/ext/json/ext/json/ext
/usr/bin/install: cannot create regular file `C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.6.3/ext/json/ext/json/ext': No such file or directory
make: *** [install-so] Error 1


Gem files will remain installed in C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.6.3 for inspection.
Results logged to C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.6.3/ext/json/ext/parser/gem_make.out