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[willnet]

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /usr/local/bundle/gems/capybara-webkit-1.3.1
/usr/local/bin/ruby -r ./siteconf20151209-10-ci6abu.rb extconf.rb
Command 'qmake -spec linux-g++ ' not available

Makefile not found

Gem files will remain installed in /usr/local/bundle/gems/capybara-webkit-1.3.1 for inspection.
Results logged to /usr/local/bundle/extensions/x86_64-linux/2.2.0-static/capybara-webkit-1.3.1/gem_make.out
Installing roadie 2.4.3
An error occurred while installing capybara-webkit (1.3.1), and Bundler cannot
continue.
Make sure that `gem install capybara-webkit -v '1.3.1'` succeeds before
bundling.
The command '/bin/sh -c gem install bundler && bundle install --jobs 20 --retry 5' returned a non-zero code: 5