title: Error when trying to install gem websocket-driver-0.7.3
body: <p>When I try to install the websocket-driver-0.7.3 gem, I get this message on CMD:</p>
  <pre><code>Fetching websocket-driver 0.7.3
  Installing websocket-driver 0.7.3 with native extensions
  Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
  
  current directory:
  C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/websocket-driver-0.7.3/ext/websocket-driver
  C:/Ruby27-x64/bin/ruby.exe -I C:/Ruby27-x64/lib/ruby/2.7.0 -r
  ./siteconf20201109-15264-1prb1qx.rb extconf.rb
  creating Makefile
  
  current directory:
  C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/websocket-driver-0.7.3/ext/websocket-driver
  make &quot;DESTDIR=&quot; clean
  current directory:
  C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/websocket-driver-0.7.3/ext/websocket-driver
  make &quot;DESTDIR=&quot;
  make failedNo such file or directory - make &quot;DESTDIR=&quot;
  
  Gem files will remain installed in
  C:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/websocket-driver-0.7.3 for inspection.
  Results logged to
  C:/Ruby27-x64/lib/ruby/gems/2.7.0/extensions/x64-mingw32/2.7.0/websocket-driver-0.7.3/gem_make.out
  </code></pre>
  <p>I'm using ruby 2.7.0. Please help!</p>