Virtual Reality SDKs' must include 'Daydream' or 'Cardboard'

I'm new to developing for Oculus. I've got a game in Unity that I previously started while developing for Google Daydream. 
For my simple scene I have: deleted my player and GVR event managers, dropped in the OVRPlayerController, in Player Settings > XR Settings I removed the Daydream SDK and added the Oculus SDK.
I go choose Build & Run, but I get the following four error messages:

• On Android 'Player Settings > Virtual Reality SDKs' must include 'Daydream' or 'Cardboard'.
  Please fix this setting and rebuild your app.
  UnityEngine.Debug:LogError(Object)
  GvrBuildProcessor:OnPreprocessBuild(BuildTarget, String) (at Assets/GoogleVR/Editor/GvrBuildProcessor.cs:54)
  UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
• Error building Player: On Android 'Player Settings > Virtual Reality SDKs' must include 'Daydream' or 'Cardboard'.
  Please fix this setting and rebuild your app.
• Build completed with a result of 'Failed'
  UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
• UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
    at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0021f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:182 
    at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:89
  UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
  

Using Unity 2018.1.0f2, OVRPlugin 1.28