diff --git a/revanced-magisk/customize.sh b/revanced-magisk/customize.sh
index ad2d7257ee..9344ff9c43 100755
--- a/revanced-magisk/customize.sh
+++ b/revanced-magisk/customize.sh
@@ -7,21 +7,18 @@ Your device: $ARCH
 Module: $MODULE_ARCH"
 fi
 
+alias cmpr="$MODPATH/bin/$ARCH/cmpr"
 if [ "$ARCH" = "arm" ]; then
 	ARCH_LIB=armeabi-v7a
-	alias cmpr='$MODPATH/bin/arm/cmpr'
 elif [ "$ARCH" = "arm64" ]; then
 	ARCH_LIB=arm64-v8a
-	alias cmpr='$MODPATH/bin/arm64/cmpr'
 elif [ "$ARCH" = "x86" ]; then
 	ARCH_LIB=x86
-	alias cmpr='$MODPATH/bin/x86/cmpr'
 elif [ "$ARCH" = "x64" ]; then
 	ARCH_LIB=x86_64
-	alias cmpr='$MODPATH/bin/x64/cmpr'
-else
-	abort "ERROR: unsupported arch: ${ARCH}"
-fi
+else abort "ERROR: unreachable: ${ARCH}"; fi
+RVPATH=/data/adb/rvhc/${MODPATH##*/}.apk
+
 set_perm_recursive "$MODPATH/bin" 0 0 0755 0777
 
 if su -M -c true >/dev/null 2>/dev/null; then
@@ -30,21 +27,34 @@ else
 	alias mm='nsenter -t1 -m'
 fi
 
-mm grep "$PKG_NAME" /proc/mounts | while read -r line; do
+mm grep -F "$PKG_NAME" /proc/mounts | while read -r line; do
 	ui_print "* Un-mount"
 	mp=${line#* } mp=${mp%% *}
 	mm umount -l "${mp%%\\*}"
 done
 am force-stop "$PKG_NAME"
 
+if ! (pm path "$PKG_NAME" >/dev/null 2>&1 </dev/null); then
+	if ! op=$(pm install-existing "$PKG_NAME" 2>&1 </dev/null) && echo "$op" | grep -qv NameNotFoundException; then
+		ui_print "ERROR: install-existing failed"
+		abort "$op"
+	fi
+	ui_print "* Installed existing $PKG_NAME"
+fi
+
 INS=true
+IS_SYS=false
 if BASEPATH=$(pm path "$PKG_NAME" 2>&1 </dev/null); then
 	BASEPATH=${BASEPATH##*:} BASEPATH=${BASEPATH%/*}
-	if [ "${BASEPATH:1:6}" = system ]; then
+	if echo "$BASEPATH" | grep -qF -e '/system/' -e '/product/'; then
 		ui_print "* $PKG_NAME is a system app"
+		if [ "${BASEPATH:1:6}" != system ]; then BASEPATH=/system${BASEPATH}; fi
+		IS_SYS=true
 	elif [ ! -d "${BASEPATH}/lib" ]; then
 		ui_print "* Invalid installation found. Uninstalling..."
-		pm uninstall -k --user 0 "$PKG_NAME"
+		if ! op=$(pm uninstall -k --user 0 "$PKG_NAME" 2>&1 </dev/null); then
+			abort "$op"
+		fi
 	elif [ ! -f "$MODPATH/$PKG_NAME.apk" ]; then
 		ui_print "* Stock $PKG_NAME APK was not found"
 		VERSION=$(dumpsys package "$PKG_NAME" | grep -m1 versionName) VERSION="${VERSION#*=}"
@@ -68,33 +78,53 @@ install() {
 		abort "ERROR: Stock $PKG_NAME apk was not found"
 	fi
 	ui_print "* Updating $PKG_NAME to $PKG_VER"
+	VERIF_ADB=$(settings get global verifier_verify_adb_installs)
 	settings put global verifier_verify_adb_installs 0
 	SZ=$(stat -c "%s" "$MODPATH/$PKG_NAME.apk")
-	if ! SES=$(pm install-create --user 0 -i com.android.vending -r -d -S "$SZ" 2>&1); then
-		ui_print "ERROR: install-create failed"
-		abort "$SES"
-	fi
-	SES=${SES#*[} SES=${SES%]*}
-	set_perm "$MODPATH/$PKG_NAME.apk" 1000 1000 644 u:object_r:apk_data_file:s0
-	if ! op=$(pm install-write -S "$SZ" "$SES" "$PKG_NAME.apk" "$MODPATH/$PKG_NAME.apk" 2>&1); then
-		ui_print "ERROR: install-write failed"
-		abort "$op"
-	fi
-	if ! op=$(pm install-commit "$SES" 2>&1); then
-		if echo "$op" | grep -q INSTALL_FAILED_VERSION_DOWNGRADE; then
-			ui_print "* INSTALL_FAILED_VERSION_DOWNGRADE. Uninstalling..."
-			pm uninstall -k --user 0 "$PKG_NAME"
-			return 1
+
+	while true; do
+		if ! SES=$(pm install-create --user 0 -i com.android.vending -r -d -S "$SZ" 2>&1 </dev/null); then
+			ui_print "ERROR: install-create failed"
+			settings put global verifier_verify_adb_installs "$VERIF_ADB"
+			abort "$SES"
 		fi
-		ui_print "ERROR: install-commit failed"
-		abort "$op"
-	fi
-	settings put global verifier_verify_adb_installs 1
-	if BASEPATH=$(pm path "$PKG_NAME" 2>&1 </dev/null); then
-		BASEPATH=${BASEPATH##*:} BASEPATH=${BASEPATH%/*}
-	else
-		abort "ERROR: install $PKG_NAME manually and reflash the module"
-	fi
+		SES=${SES#*[} SES=${SES%]*}
+		set_perm "$MODPATH/$PKG_NAME.apk" 1000 1000 644 u:object_r:apk_data_file:s0
+		if ! op=$(pm install-write -S "$SZ" "$SES" "$PKG_NAME.apk" "$MODPATH/$PKG_NAME.apk" 2>&1 </dev/null); then
+			ui_print "ERROR: install-write failed"
+			settings put global verifier_verify_adb_installs "$VERIF_ADB"
+			abort "$op"
+		fi
+		if ! op=$(pm install-commit "$SES" 2>&1 </dev/null); then
+			if echo "$op" | grep -q INSTALL_FAILED_VERSION_DOWNGRADE; then
+				ui_print "* ERROR: INSTALL_FAILED_VERSION_DOWNGRADE"
+				if [ "$IS_SYS" = true ]; then
+					ui_print "* Use system mount mode"
+					BASEPATH=${MODPATH}${BASEPATH}
+					set_perm "$BASEPATH" 1000 1000 755 u:object_r:system_file:s0
+					RVPATH=$BASEPATH/${BASEPATH##*/}.apk
+					rm "$MODPATH/service.sh" "$MODPATH/uninstall.sh"
+					break
+				else
+					ui_print "* Uninstalling..."
+					if ! op=$(pm uninstall -k --user 0 "$PKG_NAME" 2>&1 </dev/null); then
+						ui_print "$op"
+					fi
+					continue
+				fi
+			fi
+			ui_print "ERROR: install-commit failed"
+			settings put global verifier_verify_adb_installs "$VERIF_ADB"
+			abort "$op"
+		fi
+		if BASEPATH=$(pm path "$PKG_NAME" 2>&1 </dev/null); then
+			BASEPATH=${BASEPATH##*:} BASEPATH=${BASEPATH%/*}
+		else
+			abort "ERROR: install $PKG_NAME manually and reflash the module"
+		fi
+		break
+	done
+	settings put global verifier_verify_adb_installs "$VERIF_ADB"
 }
 if [ $INS = true ] && ! install; then abort; fi
 
@@ -108,25 +138,32 @@ if [ -z "$(ls -A1 "$BASEPATHLIB")" ]; then
 	fi
 	set_perm_recursive "${BASEPATH}/lib" 1000 1000 755 755 u:object_r:apk_data_file:s0
 fi
+mv -f "$MODPATH/base.apk" "$RVPATH"
+
 ui_print "* Setting Permissions"
-set_perm "$MODPATH/base.apk" 1000 1000 644 u:object_r:apk_data_file:s0
+set_perm "$RVPATH" 1000 1000 644 u:object_r:apk_data_file:s0
 
-ui_print "* Mounting $PKG_NAME"
-mkdir -p "/data/adb/rvhc"
-RVPATH=/data/adb/rvhc/${MODPATH##*/}.apk
-mv -f "$MODPATH/base.apk" "$RVPATH"
+if [ "$IS_SYS" = false ]; then
+	ui_print "* Mounting $PKG_NAME"
+	mkdir -p "/data/adb/rvhc"
+	if ! op=$(mm mount -o bind "$RVPATH" "$BASEPATH/base.apk" 2>&1); then
+		ui_print "ERROR: Mount failed!"
+		ui_print "$op"
+	fi
+	am force-stop "$PKG_NAME"
 
-if ! op=$(mm mount -o bind "$RVPATH" "$BASEPATH/base.apk" 2>&1); then
-	ui_print "ERROR: Mount failed!"
-	ui_print "$op"
+	ui_print "* Optimizing $PKG_NAME"
+	nohup cmd package compile --reset "$PKG_NAME" >/dev/null 2>&1 &
 fi
-am force-stop "$PKG_NAME"
-ui_print "* Optimizing $PKG_NAME"
-nohup cmd package compile --reset "$PKG_NAME" >/dev/null 2>&1 &
 
 ui_print "* Cleanup"
 rm -rf "${MODPATH:?}/bin" "$MODPATH/$PKG_NAME.apk"
 
+if [ -d "/data/adb/modules/zygisk-assistant" ]; then
+	ui_print "* If you are using zygisk-assistant, you need to"
+	ui_print "  give root permissions to $PKG_NAME"
+fi
+
 ui_print "* Done"
 ui_print "  by j-hc (github.com/j-hc)"
 ui_print " "
diff --git a/revanced-magisk/service.sh b/revanced-magisk/service.sh
index fdfac8ea6c..09dbcb2c74 100755
--- a/revanced-magisk/service.sh
+++ b/revanced-magisk/service.sh
@@ -23,7 +23,7 @@ if [ $svcl != 0 ]; then
 fi
 BASEPATH=${BASEPATH##*:} BASEPATH=${BASEPATH%/*}
 if [ ! -d "$BASEPATH/lib" ]; then
-	err "zygote crashed (fix your ROM)"
+	err "system force-rebooted (fix your ROM)"
 	exit
 fi
 VERSION=$(dumpsys package "$PKG_NAME" | grep -m1 versionName) VERSION="${VERSION#*=}"