Infrastructure

I recently upgraded the ruby gem dependencies and I broke the OSCI builder. The build log says bundler is older than in my gem file and that it's missing libffi-devel.

last_build_date: 2018-02-16 00:03:02 (UTC)
last_build_commit: 7905889525c1ee09a41985abcf1f7a82a0870a69
submodule_commits: {}

No local changes to save

Already up-to-date.

Warning: the running version of Bundler (1.13.7) is older than the version that created the lockfile (1.16.1). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Using concurrent-ruby 1.0.5
Using minitest 5.11.3
Using thread_safe 0.3.6
Using public_suffix 2.0.5
Using coffee-script-source 1.11.1
Using execjs 2.7.0
Using colorator 1.1.0
Installing ffi 1.9.21 with native extensions
Using multipart-post 2.0.0
Using forwardable-extended 2.6.0
Using gemoji 3.0.0
Using net-dns 0.8.0
Using rb-fsevent 0.10.2
Using kramdown 1.16.2
Using liquid 4.0.0
Using mercenary 0.3.6
Using rouge 2.2.1
Using safe_yaml 1.0.4
Using mini_portile2 2.3.0
Using jekyll-paginate 1.1.0
Using rubyzip 1.2.1
Using jekyll-swiss 0.4.0
Using unicode-display_width 1.3.0
Using bundler 1.13.7
Using i18n 0.9.5
Using tzinfo 1.2.5
Using addressable 2.5.2
Using coffee-script 2.4.1
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /srv/builder/.gem/ruby/2.4.0/gems/ffi-1.9.21/ext/ffi_c
/usr/bin/ruby -r ./siteconf20180215-1821-111t5k2.rb extconf.rb
checking for ffi.h... no
checking for ffi.h in /usr/local/include,/usr/include/ffi... no
checking for shlwapi.h... no
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
creating extconf.h
creating Makefile

current directory: /srv/builder/.gem/ruby/2.4.0/gems/ffi-1.9.21/ext/ffi_c
make "DESTDIR=" clean
rm -f 
rm -f ffi_c.so  *.o  *.bak mkmf.log .*.time

current directory: /srv/builder/.gem/ruby/2.4.0/gems/ffi-1.9.21/ext/ffi_c
make "DESTDIR="
Running autoreconf for libffi
/srv/builder/.gem/ruby/2.4.0/gems/ffi-1.9.21/ext/ffi_c/libffi/autogen.sh: line
2: exec: autoreconf: not found
make: *** [libffi.mk:7:
"/srv/builder/.gem/ruby/2.4.0/gems/ffi-1.9.21/ext/ffi_c/libffi-x86_64-linux"/.libs/libffi_convenience.a]
Error 127

make failed, exit code 2

Gem files will remain installed in /srv/builder/.gem/ruby/2.4.0/gems/ffi-1.9.21
for inspection.
Results logged to
/srv/builder/.gem/ruby/2.4.0/extensions/x86_64-linux/2.4.0/ffi-1.9.21/gem_make.out

An error occurred while installing ffi (1.9.21), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.21'` succeeds before bundling.

Is it possible someone could add this to the OSCI build environment?