Hi guys, I'm running Drupal 7.34 and Omega 7.x.4.3 in Ubuntu 12.04 with latest updates but after I create a sub-theme of Omega and run "bundle install" I get this error:

vagrant@precise32:/var/www/drupal/sites/all/themes/my_omega$ bundle install
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies...
Using addressable 2.3.7
Using sass 3.4.13
Using sassy-maps 0.4.0
Using breakpoint 2.5.0
Using hitimes 1.2.2
Using timers 4.0.1
Using celluloid 0.16.0
Using chunky_png 1.3.4
Using coderay 1.1.0
Using multi_json 1.11.0
Using compass-core 1.0.3
Using compass-import-once 1.0.5
Using rb-fsevent 0.9.4

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

/home/vagrant/.rvm/rubies/ruby-1.9.3-p551/bin/ruby -r ./siteconf20150315-251
9-1du7s98.rb extconf.rb
checking for ffi_call() in -lffi... yes
checking for ffi_prep_closure()... yes
checking for ffi_raw_call()... yes
checking for ffi_prep_raw_closure()... yes
checking for rb_thread_blocking_region()... yes
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
checking for ffi_prep_cif_var()... yes
creating extconf.h
creating Makefile

make clean

make
compiling Types.c
compiling MethodHandle.c
compiling Function.c
compiling DataConverter.c
compiling ClosurePool.c
compiling StructByReference.c
compiling AbstractMemory.c
compiling LastError.c
compiling ArrayType.c
compiling Platform.c
compiling Type.c
compiling Variadic.c
compiling StructByValue.c
compiling StructLayout.c
compiling Thread.c
compiling Buffer.c
compiling Call.c
Call.c: In function 'rbffi_SetupCallParams':
Call.c:206:1: error: 'UINT32_ADJ' undeclared (first use in this function)
Call.c:206:1: note: each undeclared identifier is reported only once for each fu
nction it appears in
Call.c:230:1: error: 'UINT64_ADJ' undeclared (first use in this function)
make: *** [Call.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/vagrant/.rvm/gems/ruby-1.9.3-p551@omega
.my_omega/gems/ffi-1.9.7 for inspection.
Results logged to /home/vagrant/.rvm/gems/ruby-1.9.3-p551@omega.my_omega/extensi
ons/x86-linux/1.9.1/ffi-1.9.7/gem_make.out
An error occurred while installing ffi (1.9.7), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.7'` succeeds before bundling.

Anyone figured this out?