issue is probably fixed but not in package yet https://github.com/mitchellh/vagrant-installers/pull/100/files
cd /opt/vagrant/embedded sudo chown zain:zain -R (avoids a lot of sudos)
hashicorp/vagrant#6721 cd /opt/vagrant/embedded bin/gem uninstall ffi check the version of ffi install ls /opt/vagrant/embedded/gems/extensions/x86_64-linux/2.2.0/ then install that version bin/gem install ffi -v 1.9.14 --clear-sources --source http://rubygems.org/ then copy file cp lib/ruby/gems/2.2.0/extensions/x86_64-linux/2.2.0/ffi-1.9.14/ffi_c.so /opt/vagrant/embedded/gems/extensions/x86_64-linux/2.2.0/ffi-1.9.14/ffi_c.so (both version should be same)
additional (might not not needed) http://guides.rubygems.org/ssl-certificate-update/#installing-using-update-packages might need sudo