Need to define a default subspec

unless you have a default, all subspecs are included.
you can’t just have a blank one either, so I put the core in there.

Material.podspec

@@ -7,21 +7,28 @@ Pod::Spec.new do |s|
   s.social_media_url = 'https://www.facebook.com/cosmicmindio'
   s.social_media_url = 'https://www.facebook.com/cosmicmindio'
   s.authors = { 'CosmicMind, Inc.' => 'support@cosmicmind.io' }
   s.authors = { 'CosmicMind, Inc.' => 'support@cosmicmind.io' }
   s.source = { :git => 'https://github.com/CosmicMind/Material.git', :tag => s.version }
   s.source = { :git => 'https://github.com/CosmicMind/Material.git', :tag => s.version }
-  s.ios.deployment_target = '8.0'
-  s.ios.source_files = 'Sources/iOS/**/*.swift'
-  s.osx.deployment_target = '10.9'
-  s.osx.source_files = 'Sources/macOS/**/*.swift'
-  s.requires_arc = true
-  s.resource_bundles = {
-      'io.cosmicmind.material.icons' => ['Sources/**/*.xcassets'],
-	  'io.cosmicmind.material.fonts' => ['Sources/**/*.ttf']
-  }
+  
+  s.default_subspec = 'Core'
+
+  s.subspec 'Core' do |s|
+    s.ios.deployment_target = '8.0'
+    s.ios.source_files = 'Sources/iOS/*.swift'
+    s.osx.deployment_target = '10.9'
+    s.osx.source_files = 'Sources/macOS/**/*.swift'
+    s.requires_arc = true
+    s.resource_bundles = {
+        'io.cosmicmind.material.icons' => ['Sources/**/*.xcassets'],
+      'io.cosmicmind.material.fonts' => ['Sources/**/*.ttf']
+    }
+  end
 
 
   s.subspec 'Camera' do |camera|
   s.subspec 'Camera' do |camera|
     camera.source_files = 'Sources/iOS/Camera/*.swift'
     camera.source_files = 'Sources/iOS/Camera/*.swift'
+    camera.dependency 'Material/Core'
   end
   end
 
 
-  s.subspec 'photos' do |photos|
+  s.subspec 'Photos' do |photos|
     photos.source_files = 'Sources/iOS/Photos/*.swift'
     photos.source_files = 'Sources/iOS/Photos/*.swift'
+    photos.dependency 'Material/Core'
   end
   end
 end
 end