title: Homebrew: Can't install with options through brew (macOS Mojave)
body: <p>I need to install sphinx via homebrew with flags, but there is error    </p>
  
  <h2>$ brew install sphinx --mysql --pgsql</h2>
  
  <pre><code>    Ignoring byebug-10.0.2 because its extensions are not built.  Try: gem pristine byebug --version 10.0.2
      Ignoring byebug-10.0.2 because its extensions are not built.  Try: gem pristine byebug --version 10.0.2
      Usage: brew install [options] formula
  
      Install formula.
  
      formula is usually the name of the formula to install, but it can be specified
      in several different ways.
  
      Unless HOMEBREW_NO_INSTALL_CLEANUP is set, brew cleanup will be run for the
      installed formulae or, every 30 days, for all formulae.
  --------------------------------------
      Error: invalid option: --mysql
  </code></pre>
  
  <p><strong>$ brew -v</strong></p>
  
  <pre><code>Homebrew 2.1.6
  Homebrew/homebrew-core (git revision bacd7; last commit 2019-06-25)
  Homebrew/homebrew-cask (git revision 48e24; last commit 2019-06-25)
  </code></pre>