diff --git a/framework/Android.bp b/framework/Android.bp
index 4fa9ccb..a969c83 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -22,6 +22,7 @@
 java_library {
     name: "framework-connectivity-protos",
     sdk_version: "module_current",
+    min_sdk_version: "30",
     proto: {
         type: "nano",
     },
@@ -105,6 +106,10 @@
         "-Wall",
         "-Werror",
         "-Wno-unused-parameter",
+        // Don't warn about S API usage even with
+        // min_sdk 30: the library is only loaded
+        // on S+ devices
+        "-Wno-unguarded-availability",
         "-Wthread-safety",
     ],
     shared_libs: [
@@ -131,6 +136,7 @@
 
 cc_library_shared {
     name: "libframework-connectivity-jni",
+    min_sdk_version: "30",
     defaults: ["libframework-connectivity-defaults"],
     srcs: [
         "jni/android_net_NetworkUtils.cpp",
@@ -147,6 +153,7 @@
 java_library {
     name: "framework-connectivity.impl",
     sdk_version: "module_current",
+    min_sdk_version: "30",
     srcs: [
         ":framework-connectivity-sources",
     ],
diff --git a/service/Android.bp b/service/Android.bp
index ec8887c..b07c55f 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -21,7 +21,7 @@
 
 cc_library_shared {
     name: "libservice-connectivity",
-    // TODO: build against the NDK (sdk_version: "30" for example)
+    min_sdk_version: "30",
     cflags: [
         "-Wall",
         "-Werror",
@@ -33,13 +33,12 @@
         "jni/onload.cpp",
     ],
     stl: "libc++_static",
+    header_libs: [
+        "libbase_headers",
+    ],
     shared_libs: [
-        "libbase",
         "liblog",
         "libnativehelper",
-        // TODO: remove dependency on ifc_[add/del]_address by having Java code to add/delete
-        // addresses, and remove dependency on libnetutils.
-        "libnetutils",
     ],
     apex_available: [
         "com.android.tethering",
@@ -49,6 +48,7 @@
 java_library {
     name: "service-connectivity-pre-jarjar",
     sdk_version: "system_server_current",
+    min_sdk_version: "30",
     srcs: [
         "src/**/*.java",
         ":framework-connectivity-shared-srcs",
@@ -87,6 +87,7 @@
 java_library {
     name: "service-connectivity-protos",
     sdk_version: "system_current",
+    min_sdk_version: "30",
     proto: {
         type: "nano",
     },
@@ -103,6 +104,7 @@
 java_library {
     name: "service-connectivity",
     sdk_version: "system_server_current",
+    min_sdk_version: "30",
     installable: true,
     static_libs: [
         "service-connectivity-pre-jarjar",
diff --git a/service/ServiceConnectivityResources/Android.bp b/service/ServiceConnectivityResources/Android.bp
index 912d99f..f491cc7 100644
--- a/service/ServiceConnectivityResources/Android.bp
+++ b/service/ServiceConnectivityResources/Android.bp
@@ -22,6 +22,7 @@
 android_app {
     name: "ServiceConnectivityResources",
     sdk_version: "module_30",
+    min_sdk_version: "30",
     resource_dirs: [
         "res",
     ],
diff --git a/service/jni/com_android_server_TestNetworkService.cpp b/service/jni/com_android_server_TestNetworkService.cpp
index 36a6fde..e7a40e5 100644
--- a/service/jni/com_android_server_TestNetworkService.cpp
+++ b/service/jni/com_android_server_TestNetworkService.cpp
@@ -35,8 +35,6 @@
 
 #include <log/log.h>
 
-#include "netutils/ifc.h"
-
 #include "jni.h"
 #include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
@@ -48,9 +46,8 @@
 //------------------------------------------------------------------------------
 
 static void throwException(JNIEnv* env, int error, const char* action, const char* iface) {
-    const std::string& msg =
-        android::base::StringPrintf("Error %s %s: %s", action, iface, strerror(error));
-
+    const std::string& msg = "Error: " + std::string(action) + " " + std::string(iface) +  ": "
+                + std::string(strerror(error));
     jniThrowException(env, "java/lang/IllegalStateException", msg.c_str());
 }