diff --git a/metadata/com.dessalines.rankmyfavs.yml b/metadata/com.dessalines.rankmyfavs.yml
index 415ed1b468..344663dad3 100644
--- a/metadata/com.dessalines.rankmyfavs.yml
+++ b/metadata/com.dessalines.rankmyfavs.yml
@@ -189,12 +189,22 @@ Builds:
     commit: a025dad7a3f00e0884e84debb3a6ac6a6bbb48b9
     subdir: app
     sudo:
-      - export CPUS_MAX=16
+      - export CPUS_MAX=6
       - export CPUS=$(getconf _NPROCESSORS_ONLN)
       - for (( c=$CPUS_MAX; c<$CPUS; c++ )) ; do echo 0 > /sys/devices/system/cpu/cpu$c/online
         ; done
-    gradle:
-      - yes
+    output: build/outputs/apk/release/*.apk
+    build:
+      - mkdir upstream
+      - pushd upstream
+      - curl -L -o upstream.apk https://github.com/dessalines/rank-my-favs/releases/download/$$VERSION$$/app-release.apk
+      - unzip -q upstream.apk
+      - export upstreamhash=$(sha256sum assets/dexopt/baseline.prof|cut -d " " -f1)
+      - popd
+      - for i in {1..10}; do gradle clean assembleRelease; mkdir local; pushd local;
+        unzip -q ../build/outputs/apk/release/*.apk; export localhash=$(sha256sum
+        assets/dexopt/baseline.prof|cut -d " " -f1); [[ $localhash == $upstreamhash
+        ]] && break ; popd; rm -fr local; done
 
 AllowedAPKSigningKeys: ea7195cfce638ae6b1a8002ddc0d4863366095ea5b8d95c1cd5e25db0fe2e7c3