title: Swift Package Manager Mixed Language Source Files
body: <p>For some reason when I try to run <code>swift build</code> on my <code>Package.swift</code> file:import PackageDescription</p>
  
  <pre><code>let package = Package(
      name: "mobile-HDISegurado-ios",
      dependencies: [
          .package(url: "https://github.com/watson-developer-cloud/swift-sdk", from: "0.30.0"),
          ],
      targets: [
          .target(
              name: "mobile-HDISegurado-ios",
              dependencies: ["WatsonDeveloperCloud"],
              path: "mobile-HDISegurado-ios",
              exclude: [
                  "Config",
                  "Public",
                  "Resources",
                  ]
          )
      ] )
  </code></pre>
  
  <p>I've got the following error: </p>
  
  <blockquote>
    <p>error: target at
    '.../mobile-HDISegurado-ios'
    contains mixed language source files; feature not supported</p>
  </blockquote>
  
  <p>More details: </p>
  
  <ul>
  <li>swift package tools-version: 4.1.0</li>
  <li>project workspace with Cocoapods running.</li>
  </ul>