anchor.diff:  	&& apt-get install -y --no-install-recommends $buildDeps \
   	&& curl -fSL -o otp-src.tar.gz "$OTP_DOWNLOAD_URL" \
   	&& echo "$OTP_DOWNLOAD_SHA256 otp-src.tar.gz" | sha256sum -c - \
  -	&& mkdir -p /usr/src/otp-src \
  -	&& tar -xzf otp-src.tar.gz -C /usr/src/otp-src --strip-components=1 \
  +	&& export ERL_TOP="/usr/src/otp_src_${OTP_VERSION%%@*}" \
  +	&& mkdir -vp $ERL_TOP \
  +	&& tar -f otp-src.tar.gz -C $ERL_TOP --strip-components=1 -zxvv \
   	&& rm otp-src.tar.gz \
  -	&& cd /usr/src/otp-src \
  +	&& cd $ERL_TOP \
   	&& ./otp_build autoconf \
  -	&& ./configure --enable-sctp \
  +	&& ./configure \
  +		--enable-sctp \
  +		--enable-dirty-schedulers \
   	&& make -j$(nproc) \
   	&& make install \
   	&& find /usr/local -name examples | xargs rm -rf \
   	&& apt-get purge -y --auto-remove $buildDeps \
  -	&& rm -rf /usr/src/otp-src /var/lib/apt/lists/*
  +	&& rm -rf $ERL_TOP /var/lib/apt/lists/*
   
   CMD ["erl"]
   
  
positive.code: FROM buildpack-deps:jessie
  
  ENV OTP_VERSION="20.0-rc0@7cd91bb"
  
  # We'll install the build dependencies for erlang-odbc along with the erlang
  # build process:
  RUN set -xe \
  	&& OTP_DOWNLOAD_URL="https://github.com/erlang/otp/archive/${OTP_VERSION##*@}.tar.gz" \
  	&& OTP_DOWNLOAD_SHA256="4efabad8172162616b2de2d27cf938bb1be2edc8950179052dca351b2f7dbedd" \
  	&& runtimeDeps='libodbc1 \
  			libsctp1' \
  	&& buildDeps='unixodbc-dev \
  
negative.code: 	&& install -v ./rebar /usr/local/bin/ \
  	&& rm -rf /usr/src/rebar-src
  
  ENV REBAR3_VERSION="3.3.2"
  
  RUN set -xe \
  	&& REBAR3_DOWNLOAD_URL="https://github.com/erlang/rebar3/archive/${REBAR3_VERSION}.tar.gz" \
  	&& REBAR3_DOWNLOAD_SHA256="ccbc27355727090b1fdde7497ab2485c3509e2fd14b48a93276b285b5760d092" \
  	&& mkdir -p /usr/src/rebar3-src \
  	&& curl -fSL -o rebar3-src.tar.gz "$REBAR3_DOWNLOAD_URL" \
  	&& echo "$REBAR3_DOWNLOAD_SHA256 rebar3-src.tar.gz" | sha256sum -c - \
  