diff --git a/Makefile b/Makefile
index 08efd007e..1e258750b 100644
--- a/Makefile
+++ b/Makefile
@@ -33,6 +33,7 @@ clean:
 	cargo clean --manifest-path programs/login/Cargo.toml
 	cargo clean --manifest-path programs/coreutils/Cargo.toml
 	cargo clean --manifest-path programs/extrautils/Cargo.toml
+	cargo clean --manifest-path programs/smith/Cargo.toml
 	cargo clean --manifest-path schemes/example/Cargo.toml
 	cargo clean --manifest-path schemes/redoxfs/Cargo.toml
 	rm -rf initfs/bin
@@ -82,6 +83,9 @@ $(KBUILD)/harddrive.bin: $(KBUILD)/kernel $(BUILD)/filesystem.bin bootloader/$(A
 
 qemu: $(KBUILD)/harddrive.bin
 	$(QEMU) $(QEMUFLAGS) -drive file=$<,format=raw,index=0,media=disk
+
+qemu_no_build:
+	$(QEMU) $(QEMUFLAGS) -drive file=$(KBUILD)/harddrive.bin,format=raw,index=0,media=disk
 endif
 
 bochs: $(KBUILD)/harddrive.bin
diff --git a/libstd b/libstd
index 9b2e8ea81..49ff9f90e 160000
--- a/libstd
+++ b/libstd
@@ -1 +1 @@
-Subproject commit 9b2e8ea8196cdf8023fb54e8581f94e45b8dec4f
+Subproject commit 49ff9f90e0249905c4e93de14acc72803ba72ce9