[DRE-maint] Bug#747690: FTBFS: `require': cannot load such file -- spec_helper

[Christian Hofstaedtler]

Source: ruby-merb-haml
Version: 1.1.3-2
Severity: serious
Justification: fails to build from source
User: debian-ruby at lists.debian.org
Usertags: ruby2.0-rm

Dear Maintainer,

During a rebuild of ruby-related packages your package failed to
build with these errors:

Running tests for ruby2.1 using debian/ruby-tests.rb...
/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- spec_helper (LoadError)
        from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from /«PKGBUILDDIR»/spec/haml_spec.rb:1:in `<top (required)>'
        from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from debian/ruby-tests.rb:4:in `block in <main>'
        from debian/ruby-tests.rb:3:in `each'
        from debian/ruby-tests.rb:3:in `<main>'
ERROR: Test "ruby2.1" failed. Exiting.
dh_auto_install: dh_ruby --install /«PKGBUILDDIR»/debian/tmp returned exit code 1
make: *** [binary] Error 1


Please note that the default ruby has been switched to 2.1 in sid.
If possible, please switch to the metapackages and `dh_ruby
--print-supported` for detecting the ruby to build for.
(Also, if everything goes according to plan, this is the last ruby
transition for jessie.)

Please find the full build log attached.

Thanks,
  -ch
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