diff --git a/taskcluster/ci/build/android.yml b/taskcluster/ci/build/android.yml
index 855f80114316..9370b8dcf53c 100644
--- a/taskcluster/ci/build/android.yml
+++ b/taskcluster/ci/build/android.yml
@@ -115,6 +115,16 @@ android-api-15-gradle/opt:
         env:
             # Bug 1292762 - Set GRADLE_USER_HOME to avoid sdk-manager-plugin intermittent
             GRADLE_USER_HOME: /home/worker/workspace/build/src/dotgradle
+        artifacts:
+          - name: public/android/geckoview.aar
+            path: /home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/outputs/aar/geckoview-withGeckoBinaries.aar
+            type: file
+          - name: public/android/geckoview_example.apk
+            path: /home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview_example/outputs/apk/geckoview_example-withGeckoBinaries.apk
+            type: file
+          - name: public/build
+            path: /home/worker/artifacts/
+            type: directory
     run:
         using: mozharness
         actions: [get-secrets build multi-l10n update]
@@ -125,5 +135,3 @@ android-api-15-gradle/opt:
         script: "mozharness/scripts/fx_desktop_build.py"
         custom-build-variant-cfg: api-15-gradle
         tooltool-downloads: internal
-
-
diff --git a/testing/mozharness/configs/builds/releng_sub_android_configs/64_api_15_gradle.py b/testing/mozharness/configs/builds/releng_sub_android_configs/64_api_15_gradle.py
index 9694c7e291b2..035d22c97c8f 100644
--- a/testing/mozharness/configs/builds/releng_sub_android_configs/64_api_15_gradle.py
+++ b/testing/mozharness/configs/builds/releng_sub_android_configs/64_api_15_gradle.py
@@ -5,4 +5,13 @@ config = {
     'src_mozconfig': 'mobile/android/config/mozconfigs/android-api-15-gradle/nightly',
     'tooltool_manifest_src': 'mobile/android/config/tooltool-manifests/android/releng.manifest',
     'multi_locale_config_platform': 'android',
+    # It's not obvious, but postflight_build is after packaging, so the Gecko
+    # binaries are in the object directory, ready to be packaged into the
+    # GeckoView AAR.
+    'postflight_build_mach_commands': [
+        ['gradle',
+         'geckoview:assembleWithGeckoBinaries',
+         'geckoview_example:assembleWithGeckoBinaries',
+        ],
+    ],
 }