Setting include_system_libs to false fails the release

[vladshcherbin]

Steps to reproduce

Grab a fresh test project, like this one

Open rel/config.exs and change:

environment :prod do
  set include_erts: false
  set include_src: false
end

to

environment :prod do
  set include_erts: false
  set include_src: false
  set include_system_libs: false
end

Execute

MIX_ENV=prod mix do compile, phoenix.digest, release --env=prod --verbose

Verbose Logs

==> Packaging release..
==> Archiving distilleryTest-0.0.2
==> Writing tarball to rel/distilleryTest/releases/0.0.2/distilleryTest.tar.gz
==> Updating tarball
==> Stripping system libs from release tarball
==> Problem generating release tarball:
    Failed to create temporary directory `{'/tmp/.tmp_dir407353268/lib/tmp/.tmp_dir407353268/lib/compiler-7.0', :enoent}`

Description of issue

OS X 10.11.6

[bitwalker]

Thanks for the report, looks like there is a branch in the code where paths are being joined up incorrectly, I'll get that fixed ASAP.