diff --git a/Ravenwood.bp b/Ravenwood.bp
index da02298..1582266 100644
--- a/Ravenwood.bp
+++ b/Ravenwood.bp
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 // We need this "trampoline" rule to force soong to give a host-side jar to
-// framework-minus-apex.ravenwood. Otherwise, soong would mix up the arch (?) and we'd get
+// framework-minus-apex.ravenwood-base. Otherwise, soong would mix up the arch (?) and we'd get
 // a dex jar.
 java_library {
     name: "framework-minus-apex-for-hoststubgen",
@@ -26,7 +26,7 @@
 }
 
 // Generate the stub/impl from framework-all, with hidden APIs.
-java_genrule_host {
+java_genrule {
     name: "framework-minus-apex.ravenwood-base",
     tools: ["hoststubgen"],
     cmd: "$(location hoststubgen) " +
@@ -57,7 +57,9 @@
 }
 
 // Extract the impl jar from "framework-minus-apex.ravenwood-base" for subsequent build rules.
-java_genrule_host {
+// Note this emits a "device side" output, so that ravenwood tests can (implicitly)
+// depend on it.
+java_genrule {
     name: "framework-minus-apex.ravenwood",
     defaults: ["hoststubgen-for-prototype-only-genrule"],
     cmd: "cp $(in) $(out)",
@@ -68,3 +70,17 @@
         "framework-minus-apex.ravenwood.jar",
     ],
 }
+
+android_ravenwood_libgroup {
+    name: "ravenwood-runtime",
+    libs: [
+        "framework-minus-apex.ravenwood",
+        "hoststubgen-helper-runtime.ravenwood",
+        "hoststubgen-helper-framework-runtime.ravenwood",
+    ],
+}
+
+android_ravenwood_libgroup {
+    name: "ravenwood-utils",
+    libs: [],
+}