diff --git a/repos/base-hw/ports/muen.hash b/repos/base-hw/ports/muen.hash
index 8a77d3ba5a..5772385f79 100644
--- a/repos/base-hw/ports/muen.hash
+++ b/repos/base-hw/ports/muen.hash
@@ -1 +1 @@
-13c70f0751d96600723acdde3200745e93395717
+fc3e49f0c47e850625e09a021f31291b845a6728
diff --git a/repos/base-hw/ports/muen.port b/repos/base-hw/ports/muen.port
index 9fcf6e7f68..f957c06d25 100644
--- a/repos/base-hw/ports/muen.port
+++ b/repos/base-hw/ports/muen.port
@@ -3,10 +3,16 @@ VERSION   := git
 DOWNLOADS := muen.git
 
 URL(muen) := https://git.codelabs.ch/git/muen.git
-REV(muen) := 5d3b56c261804f318fb5c91a93799315c740f1a2
+REV(muen) := 4ffd2c94b1b7de268c0a428855be2e7e8b8f288e
 DIR(muen) := src/kernel/muen
 
 $(call check_tool,git)
 $(call check_tool,iasl)
 $(call check_tool,tidy)
 $(call check_tool,xsltproc)
+
+default : additional_steps
+additional_steps : $(DOWNLOADS)
+	$(VERBOSE)git -C src/kernel/muen submodule update --init tools/mugenschedcfg > /dev/null
+	$(VERBOSE)git -C src/kernel/muen submodule update --init components/libxhcidbg > /dev/null
+	$(VERBOSE)$(MAKE) -C src/kernel/muen/contrib QUIET=true download
diff --git a/repos/base-hw/src/kernel/spec/muen/target.mk b/repos/base-hw/src/kernel/spec/muen/target.mk
index 41c4d9efe8..d9177ad283 100644
--- a/repos/base-hw/src/kernel/spec/muen/target.mk
+++ b/repos/base-hw/src/kernel/spec/muen/target.mk
@@ -28,16 +28,9 @@ $(TARGET): $(MUEN_DST_DIR)
 	$(VERBOSE)$(BUILD_ENV) $(MAKE) -C $(MUEN_DST_DIR)/kernel $(BUILD_OPTS) >> $(MUEN_LOG) 2>&1
 	$(VERBOSE)$(BUILD_ENV) $(MAKE) -C $(MUEN_DST_DIR)/components $(BUILD_OPTS) install-tau0 >> $(MUEN_LOG) 2>&1
 
-$(MUEN_DST_DIR): download_contrib
+$(MUEN_DST_DIR): $(MUEN_SRC_DIR)
 	$(VERBOSE)mkdir -p $(MUEN_DST_DIR)
-	$(VERBOSE)tar c -C $(MUEN_SRC_DIR) . | tar x -C $(MUEN_DST_DIR)
-
-download_contrib: $(MUEN_SRC_DIR)
-	$(MSG_BUILD)Muen contrib
-	$(VERBOSE)cd $(MUEN_SRC_DIR) && git submodule update --init tools/mugenschedcfg > $(MUEN_LOG) 2>&1
-	$(VERBOSE)cd $(MUEN_SRC_DIR) && git submodule update --init components/libxhcidbg > $(MUEN_LOG) 2>&1
-	$(VERBOSE)$(BUILD_ENV) $(MAKE) -C $(MUEN_SRC_DIR)/contrib \
-		QUIET=true download >> $(MUEN_LOG) 2>&1
+	$(VERBOSE)tar c -C $(MUEN_SRC_DIR) . | tar x -m -C $(MUEN_DST_DIR)
 
 clean cleanall: clean_muen
 
diff --git a/repos/ports/src/virtualbox/spec/muen/vcpu.h b/repos/ports/src/virtualbox/spec/muen/vcpu.h
index ff6d1262b5..d9dadb8ffb 100644
--- a/repos/ports/src/virtualbox/spec/muen/vcpu.h
+++ b/repos/ports/src/virtualbox/spec/muen/vcpu.h
@@ -74,6 +74,6 @@ struct Subject_state
 	Segment ldtr;
 	Segment gdtr;
 	Segment idtr;
-};
+} __attribute__((packed));
 
 #endif /* _VIRTUALBOX__SPEC__MUEN__VCPU_H_ */