anchor.diff:  WORKDIR /app/src
   COPY Cargo.toml Cargo.lock ./
   COPY cli/Cargo.toml ./cli/Cargo.toml
  +COPY diesel/Cargo.toml ./diesel/Cargo.toml
   RUN cargo fetch --locked -v
   
   COPY ./ ./
  
positive.code:                                           file \
                                            libssl-dev \
                                            pkg-config \
      && curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain ${RUST_VERSION} \
      && rustup target add "${ARCHITECTURE}" \
      && apt-get remove -y --auto-remove curl \
  
negative.code: FROM japaric/x86_64-unknown-linux-musl:v0.1.10 as builder
  ENV PATH "/root/.cargo/bin:${PATH}"
  
  ARG RUST_VERSION=nightly-2017-09-21
  