anchor.diff:  make install && \
   make install-etc && \
   make install-dev && \
  +# install skypeweb
   cd && \
   tar zxvf 1.4.tar.gz && \
   cd skype4pidgin-1.4/skypeweb && \
   make && \
   make install && \
  +# install telegram purple
  +cd && \
  +tar zxvf telegram-purple_1.3.1.orig.tar.gz && \
  +cd telegram-purple && \
  +./configure && \
  +make && \
  +make install && \
  +# install bitlbee-facebook
   cd && \
   tar zxvf v1.1.2.tar.gz && \
   cd bitlbee-facebook-1.1.2 && \
  
positive.code: rm -fr 1.4.tar.gz skype4pidgin-* && \
  rm -fr v1.1.2.tar.gz bitlbee-facebook-* && \
  rm -fr purple-hangouts && \
  mkdir -p /var/lib/bitlbee && \
  chown -R daemon:daemon /var/lib/bitlbee* # dup: otherwise it won't be chown'ed when using volumes
  
  
negative.code: 
  ENV VERSION=3.5.1
  
  RUN apt-get update && apt-get install -y --no-install-recommends autoconf automake gettext gcc libtool make dpkg-dev libglib2.0-dev libotr5-dev libpurple-dev libgnutls28-dev libjson-glib-dev libprotobuf-c-dev protobuf-c-compiler mercurial libgcrypt20 libgcrypt20-dev libwebp-dev && \
  cd && \
  curl -LO# https://get.bitlbee.org/src/bitlbee-$VERSION.tar.gz && \
  curl -LO# https://github.com/EionRobb/skype4pidgin/archive/1.4.tar.gz && \
  curl -LO# https://github.com/majn/telegram-purple/releases/download/v1.3.1/telegram-purple_1.3.1.orig.tar.gz && \
  curl -LO# https://github.com/jgeboski/bitlbee-facebook/archive/v1.1.2.tar.gz && \
  hg clone https://bitbucket.org/EionRobb/purple-hangouts/ && \
  tar zxvf bitlbee-$VERSION.tar.gz && \
  