anchor.diff:          make qt-faststart && \
           cp qt-faststart ${SRC}/bin && \
           rm -rf ${DIR} && \
  -        yum history -y undo last && yum clean all && rm -rf /var/lib/yum/* && \
  +# cleanup
  +        apt-get purge -yqq \
  +        autoconf \
  +        automake \
  +        bzip2 \
  +        cmake \
  +        g++ \
  +        gcc \
  +        git \
  +        libtool \
  +        libssl-dev \
  +        make \
  +        nasm \
  +        perl \
  +        pkg-config \
  +        python \
  +        xmlto \
  +        zlib1g-dev && \
  +        apt-get autoremove -y && \
  +        apt-get clean -y && \
  +        rm -rf /var/lib/apt/lists && \
           ffmpeg -buildconf
  -
  -
  -
  +        
   # Let's make sure the app built correctly
   # Convenient to verify on https://hub.docker.com/r/jrottenberg/ffmpeg/builds/ console output
  
positive.code:         make install && \
          make distclean&& \
          rm -rf ${DIR} && \
          DIR=$(mktemp -d) &&  cd ${DIR} && \
  # faac + http://stackoverflow.com/a/4320377
          curl -Lss https://downloads.sf.net/faac/faac-${FAAC_VERSION}.tar.gz | \
          tar zxf - -C . && \
          cd faac-${FAAC_VERSION} && \
  
negative.code:         make install && \
          make distclean && \
          rm -rf ${DIR} && \
  # libvpx
          DIR=$(mktemp -d) && cd ${DIR} && \
          curl -s https://codeload.github.com/webmproject/libvpx/tar.gz/v${VPX_VERSION} | \
          tar zxf - -C . && \
          cd libvpx-${VPX_VERSION} && \
  