Source: ruby-psych Version: 2.2.4-6 Severity: serious https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ruby-psych.html
... dh_auto_configure -O--buildsystem=ruby dh_ruby --configure debian/rules override_dh_auto_build-indep make[1]: Entering directory '/build/1st/ruby-psych-2.2.4' jruby -S rake compile /usr/lib/ruby/vendor_ruby/psych.rb:6: warning: already initialized constant SNAKEYAML_VERSION /usr/lib/ruby/vendor_ruby/psych.rb:6: warning: already initialized constant ANY /usr/lib/ruby/vendor_ruby/psych.rb:6: warning: already initialized constant UTF8 /usr/lib/ruby/vendor_ruby/psych.rb:6: warning: already initialized constant UTF16LE /usr/lib/ruby/vendor_ruby/psych.rb:6: warning: already initialized constant UTF16BE /usr/share/jruby/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:59:in `require': It seems your ruby installation is missing psych (for YAML output). To eliminate this warning, please install libyaml and reinstall your ruby. rake aborted! LoadError: load error: psych -- java.lang.NoClassDefFoundError: Could not initialize class org.jruby.ext.psych.PsychEmitter /build/1st/ruby-psych-2.2.4/Rakefile:1:in `(root)' /build/1st/ruby-psych-2.2.4/Rakefile:13:in `block in (root)' (See full trace by running task with --trace) make[1]: *** [debian/rules:9: override_dh_auto_build-indep] Error 1