diff --git a/Makefile b/Makefile
index 5b411dc4..3a00aec9 100644
--- a/Makefile
+++ b/Makefile
@@ -112,7 +112,7 @@ bbl.bin: bbl
 clean-all: clean
 	rm -rf riscv-fesvr/build riscv-isa-sim/build riscv-gnu-toolchain/build riscv-tests/build riscv-pk/build
 
-.PHONY: cachetest vitetris
+.PHONY: cachetest rootfs/tetris
 
 help:
 	@echo "usage: $(MAKE) [RISCV='<install/here>'] [tool/img] ..."
diff --git a/vitetris b/vitetris
index 2c967764..a922c8b8 160000
--- a/vitetris
+++ b/vitetris
@@ -1 +1 @@
-Subproject commit 2c967764135b00bd4bdfc7eb4f5e8aa0850c59ce
+Subproject commit a922c8b8d082ba0af056d2650950e3be0f5a7b90