Error in json-1.8.2.gem building

[engmsaleh]

Here is the trace

Fetching: json-1.8.2.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing fastlane:
ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb

creating Makefile

make "DESTDIR="
compiling generator.c
In file included from generator.c:1:
In file included from ./../fbuffer/fbuffer.h:5:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/include/ruby-2.0.0/ruby.h:33:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/include/ruby-2.0.0/ruby/ruby.h:24:10: fatal error: 'ruby/config.h' file not found

include "ruby/config.h"

     ^

1 error generated.
make: *** [generator.o] Error 1

Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/json-1.8.2 for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/gems/json-1.8.2/ext/json/ext/generator/gem_make.out

[engmsaleh]

I have solved it, it was a matter of updating my Ruby version using RVM and all went good

[KrauseFx]

Great to hear 👍

[vidurpunj]

I have the same problem can you tell me to which Ruby version you have updated to.

[KrauseFx]

Which OS are you using? Can you run ruby -v?