fastlane add_plugin pgyer 报错处理

fastlane安装蒲公英插件报错：
[10:38:16]: It seems like you wanted to load some plugins, however they couldn't be loaded
[10:38:16]: Please follow the troubleshooting guide: https://github.com/fastlane/fastlane/blob/master/fastlane/docs/PluginsTroubleshooting.md
[10:38:17]: Plugin 'fastlane-plugin-pgyer' was added to './.fastlane/Pluginfile'
[10:38:17]: Make sure to commit your Gemfile, Gemfile.lock and Pluginfile to version control
Installing plugin dependencies...
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
/Users/mini5/.fastlane/bin/bundle/lib/ruby/gems/2.2.0/gems/json-2.1.0/ext/json/ext/generator
/Users/mini5/.fastlane/bin/bundle/bin/ruby -r
./siteconf20170912-34608-1acd86j.rb extconf.rb
creating Makefile

current directory:
/Users/mini5/.fastlane/bin/bundle/lib/ruby/gems/2.2.0/gems/json-2.1.0/ext/json/ext/generator
make "DESTDIR=" clean

current directory:
/Users/mini5/.fastlane/bin/bundle/lib/ruby/gems/2.2.0/gems/json-2.1.0/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
clang: warning: no such sysroot directory:
'/Applications/Xcode-7.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk'
[-Wmissing-sysroot]
In file included from generator.c:1:
In file included from ./../fbuffer/fbuffer.h:5:
In file included from
/Users/mini5/.fastlane/bin/bundle/include/ruby-2.2.0/ruby.h:33:
In file included from
/Users/mini5/.fastlane/bin/bundle/include/ruby-2.2.0/ruby/ruby.h:29:
/Users/mini5/.fastlane/bin/bundle/include/ruby-2.2.0/ruby/defines.h:26:10: fatal
error: 'stdio.h' file not found

include

     ^

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

make failed, exit code 2

Gem files will remain installed in
/Users/mini5/.fastlane/bin/bundle/lib/ruby/gems/2.2.0/gems/json-2.1.0 for
inspection.
Results logged to
/Users/mini5/.fastlane/bin/bundle/lib/ruby/gems/2.2.0/extensions/x86_64-darwin-15/2.2.0-static/json-2.1.0/gem_make.out

An error occurred while installing json (2.1.0), and Bundler cannot
continue.
Make sure that gem install json -v '2.1.0' succeeds before bundling.

解决方式：

gem install bundler
bundle install
fastlane add_plugin pgyer

成功！