message: Show me all the installed versions and use only major.minor format
diff: @@ -72,7 +72,11 @@ sudo update-alternatives --set gcc /usr/bin/gcc-7
  sudo update-alternatives --set cc /usr/bin/gcc
  sudo update-alternatives --set c++ /usr/bin/g++
  -pyenv global 3.5.1-3
  +# Show me all the installed versions
  +pyenv versions
  +
  +# Globally set the version we wish to use
  +pyenv global 3.5
  if [ -z "${BUILD_TOOL}" ]; then
  export BUILD_TOOL=make
  