anchor.diff:  # Prepare the ISO directory with the kernel
   RUN cp -v /linux-kernel/arch/x86_64/boot/bzImage /tmp/iso/boot/vmlinuz64
   
  +# Build VBox guest additions
  +RUN mkdir -p /vboxguest && \
  +    cd /vboxguest && \
  +    curl -L -o vboxguest.iso http://download.virtualbox.org/virtualbox/${VBOX_VERSION}/VBoxGuestAdditions_${VBOX_VERSION}.iso && \
  +    7z x vboxguest.iso -ir'!VBoxLinuxAdditions.run' && \
  +    sh VBoxLinuxAdditions.run --noexec --target . && \
  +    mkdir x86 && cd x86 && tar xvjf ../VBoxGuestAdditions-x86.tar.bz2 && cd .. && \
  +    mkdir amd64 && cd amd64 && tar xvjf ../VBoxGuestAdditions-amd64.tar.bz2 && cd .. && \
  +    cd amd64/src/vboxguest-${VBOX_VERSION} && KERN_DIR=/linux-kernel/ make && cd ../../.. && \
  +    cp amd64/src/vboxguest-${VBOX_VERSION}/*.ko $ROOTFS/lib/modules/$KERNEL_VERSION-tinycore64 && \
  +    mkdir -p $ROOTFS/sbin && cp x86/lib/VBoxGuestAdditions/mount.vboxsf $ROOTFS/sbin/
  +
   # Download the rootfs, don't unpack it though:
   RUN curl -L -o /tcl_rootfs.gz $TCL_REPO_BASE/release/distribution_files/rootfs.gz
   
  
positive.code:                         xorriso \
                          syslinux \
                          automake \
                          pkg-config
  
  ENV KERNEL_VERSION  3.16.1
  ENV AUFS_BRANCH     aufs3.16
  
negative.code:         rm -f /tmp/$dep.tcz ;\
      done
  
  # Make sure that all the modules we might have added are recognized
  RUN depmod -a -b $ROOTFS $KERNEL_VERSION-tinycore64
  
  # get generate_cert
  RUN curl -L -o $ROOTFS/usr/local/bin/generate_cert https://github.com/SvenDowideit/generate_cert/releases/download/0.1/generate_cert-0.1-linux-386/ && \
      chmod +x $ROOTFS/usr/local/bin/generate_cert
  