我不确定这是什么时候发生的，但我已经把我的环境变成了一个我无法建立的状态。我查看了堆栈跟踪，但其中没有任何内容对我有帮助。
$ bundle exec rake build --trace
rake aborted!
Don't know how to build task 'build' (see --tasks)
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/task_manager.rb:71:in `[]'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:149:in `invoke_task'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:106:in `each'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:106:in `block in top_level'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:115:in `run_with_threads'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:100:in `top_level'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:78:in `block in run'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:176:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/lib/rake/application.rb:75:in `run'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.1.2/bin/rake:33:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.3.0/bin/rake:23:in `load'
/usr/local/rvm/gems/ruby-2.3.0/bin/rake:23:in `<main>'
/usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `eval'
/usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `<main>'