steps:
- script: |
    set -ex
    HOMEBREW_NO_AUTO_UPDATE=1 brew install pkg-config lzo xz libpng
    # Remove the dynamic libraries of these libraries, to ensure we use
    # the static versions. That is important, as it is unlikely any
    # end-user has these brew libraries installed.
    rm /usr/local/Cellar/lzo/*/lib/*.dylib
    rm /usr/local/Cellar/xz/*/lib/*.dylib
    rm /usr/local/Cellar/libpng/*/lib/*.dylib
  displayName: 'Install dependencies'