'gem install god' fails with NotImplementedError: C extensions are not supported

[jpa57]

Our application is a JRuby application, and something about the way it is configured causes this to occur. I can install god in a Ruby 2.3.3 / Rails 4.2 app without issue. Jruby 9.05 and 9.01 / Rails 3.2 however, gives me the "C extensions" error on OSX and CentOS.

My objective is to automatically start Resque servers in production, and I don't like the other options, so I'm hoping someone can suggest a workaround or configuration option.

Here's the output. It deletes the ./siteconf.*rb on each run and the filename is unique as well:

Mongo:plus jeff$ gem install god
Building native extensions.  This could take a while...
ERROR:  Error installing god:
	ERROR: Failed to build gem native extension.

    current directory: /Users/jeff/.rvm/gems/jruby-9.0.5.0@rails3.2god/gems/god-0.13.7/ext/god
/Users/jeff/.rvm/rubies/jruby-9.0.5.0/bin/jruby -r ./siteconf20170905-61042-zgo8dn.rb extconf.rb
NotImplementedError: C extensions are not supported
    <top> at /Users/jeff/.rvm/rubies/jruby-9.0.5.0/lib/ruby/stdlib/mkmf.rb:1
  require at org/jruby/RubyKernel.java:937
   (root) at /Users/jeff/.rvm/rubies/jruby-9.0.5.0/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1
    <top> at extconf.rb:1

extconf failed, exit code 1

Gem files will remain installed in /Users/jeff/.rvm/gems/jruby-9.0.5.0@rails3.2god/gems/god-0.13.7 for inspection.
Results logged to /Users/jeff/.rvm/gems/jruby-9.0.5.0@rails3.2god/extensions/universal-java-1.8/2.2.0/god-0.13.7/gem_make.out

[sixtyfive]

Just stumbled upon this, too, and I think God might have been written with only MRI in mind. Would still be nice, @mojombo, to know whether JRuby is considered in-scope by you or not?