message: Pin macos build script to boost 1.67
  Boost 1.68 just about to be released; pin the macos homebrew install to 1.67 for now
diff: done
  fi
  printf "\\tInstalling boost libraries.\\n"
  - if ! "${BREW}" install boost
  + if ! "${BREW}" install https://raw.githubusercontent.com/Homebrew/homebrew-core/f946d12e295c8a27519b73cc810d06593270a07f/Formula/boost.rb
  then
  printf "\\tUnable to install boost 1.67 libraries at this time. 0\\n"
  printf "\\tExiting now.\\n\\n"
  