anchor.diff:  # Install sudoers configuration
   COPY build/sudoers /etc/sudoers.d/rake-compiler-dock
   
  -ENV RUBY_CC_VERSION 2.7.0:2.6.0:2.5.0:2.4.0:2.3.0:2.2.2
  +ENV RUBY_CC_VERSION 3.0.0:2.7.0:2.6.0:2.5.0:2.4.0:2.3.0:2.2.2
   
   CMD bash
  
positive.code:     export CFLAGS='-s -O1 -fno-omit-frame-pointer -fno-fast-math' && \
      export MAKE='make V=0' && \
      rake-compiler cross-ruby VERSION=$XRUBIES HOST=<%= target %> && \
      rm -rf ~/.rake-compiler/builds ~/.rake-compiler/sources && \
      find /usr/local/rvm -type d -print0 | sudo xargs -0 chmod g+sw "
  
  
negative.code:         ruby /root/mk_i686.rb "
  <% end %>
  
  # Patch rake-compiler to build and install static libraries for Linux rubies
  USER rvm
  COPY build/patches2 /home/rvm/patches/
  RUN bash -c " \
      for v in ${RVM_RUBIES} ; do \
        cd /usr/local/rvm/gems/ruby-\$v/gems/rake-compiler-1.1.0 && \
        ( git apply /home/rvm/patches/rake-compiler-1.1.0/*.patch || true ) && \
        cd /usr/local/rvm/gems/ruby-\$v/gems/hoe-3.20.0 && \
        ( git apply /home/rvm/patches/hoe-3.20.0/*.patch || true ) \
      done "
  
  # Patch ruby-2.7.0 for cross build
  USER root
  