Shouldn't that just be:  ``` bash   ... elif [[ -n "$HOMEBREW_LINUX" ]] then   HOMEBREW_PRODUCT="Linuxbrew"   HOMEBREW_OS_VERSION="$(lsb_release -sd 2>/dev/null)" else   HOMEBREW_PRODUCT="${HOMEBREW_SYSTEM}brew"   HOMEBREW_OS_VERSION="$(uname -r 2>/dev/null)" fi ``` 