title: Redefinition of module 'Firebase'
body: <p>I'm trying to integrate Firebase into my app, but as soon as I'm building it after I thought I finished my install I get:</p>
  <pre><code>Redefinition of module 'Firebase'
  </code></pre>
  <p>as well as</p>
  <pre><code>Could not build Objective-C module 'SwiftOverlayShims'
  </code></pre>
  <p>which I have no idea what that means but I'm assuming its a result of the first.</p>
  <p>My podfile looks like this:</p>
  <pre><code># Uncomment the next line to define a global platform for your project
  # platform :ios, '9.0'
  
  target 'app' do
    # Comment the next line if you don't want to use dynamic frameworks
    use_frameworks!
  
  pod 'Firebase/Auth'
  
    # Pods for app
  
  end
  </code></pre>
  <p>So I don't think theres anything conflicting there.  I saw a solution that told me to go into my Header Search Path and see if my project had multiple Firebase directories, but I have no custom paths, so that wasn't it.  Any insight?</p>
  <p>EDIT: Here is the exact display from my errors
  <a href="https://i.stack.imgur.com/ylsbC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ylsbC.png" alt="enter image description here" /></a></p>
  <p>Uncommenting the platform line in my podfile and changing it to iOS 10.0 did get rid of the error saying &quot;Could not build Objective-C module 'Firebase'&quot; So we have made some progress.</p>
  <p>Here is the path when selecting &quot;previously defined here&quot;</p>
  <p><a href="https://i.stack.imgur.com/2zRpS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2zRpS.png" alt="enter image description here" /></a></p>
  <p>From what I can tell, it is only giving me one location.  Selecting the redefinition error just gives me the relative path of module.modulemap , so I am assuming that is referring to the same thing.  I am also getting multiple warnings like this</p>
  <pre><code>
  Skipping duplicate build file in Copy Files build phase: /Users/me/Library/Developer/Xcode/DerivedData/app-elgcucdextsnzqbtlznbqeulbfks/SourcePackages/artifacts/Firebase/FirebaseAnalytics.xcframework/ios-arm64_i386_x86_64-simulator/FirebaseAnalytics.framework
  
  </code></pre>
  <p>as well as a couple other frameworks in the ios-arm64_i386_x86_64-simulator directory, so maybe that has something to do with it.</p>