diff --git a/mk/disk.mk b/mk/disk.mk
index e11c72c..2a45c44 100644
--- a/mk/disk.mk
+++ b/mk/disk.mk
@@ -1,4 +1,4 @@
-build/harddrive.img: $(FILESYSTEM_CONFIG)
+build/harddrive.img: prefix $(FILESYSTEM_CONFIG)
 	$(HOST_CARGO) build --manifest-path installer/Cargo.toml --release
 	mkdir -p build
 	rm -rf $@  $@.partial
@@ -6,7 +6,7 @@ build/harddrive.img: $(FILESYSTEM_CONFIG)
 	$(INSTALLER) -c $(FILESYSTEM_CONFIG) $@.partial
 	mv $@.partial $@
 
-build/livedisk.iso: $(FILESYSTEM_CONFIG)
+build/livedisk.iso: prefix $(FILESYSTEM_CONFIG)
 	$(HOST_CARGO) build --manifest-path installer/Cargo.toml --release
 	mkdir -p build
 	rm -rf $@  $@.partial
@@ -14,6 +14,28 @@ build/livedisk.iso: $(FILESYSTEM_CONFIG)
 	$(INSTALLER) -c $(FILESYSTEM_CONFIG) --live $@.partial
 	mv $@.partial $@
 
+build/filesystem.img: prefix $(FILESYSTEM_CONFIG)
+	mkdir -p build
+	$(HOST_CARGO) build --manifest-path cookbook/Cargo.toml --release
+	$(HOST_CARGO) build --manifest-path installer/Cargo.toml --release
+	$(HOST_CARGO) build --manifest-path redoxfs/Cargo.toml --release
+	-$(FUMOUNT) build/filesystem/ || true
+	rm -rf $@  $@.partial build/filesystem/
+	fallocate --posix --length "$(FILESYSTEM_SIZE)MiB" $@.partial
+	$(HOST_CARGO) run --release \
+		--manifest-path redoxfs/Cargo.toml \
+		--bin redoxfs-mkfs \
+		-- $(REDOXFS_MKFS_FLAGS) $@.partial
+	mkdir -p build/filesystem/
+	redoxfs/target/release/redoxfs $@.partial build/filesystem/
+	sleep 1
+	pgrep redoxfs
+	$(INSTALLER) -c $(FILESYSTEM_CONFIG) build/filesystem/
+	sync
+	-$(FUMOUNT) build/filesystem/ || true
+	rm -rf build/filesystem/
+	mv $@.partial $@
+
 mount: FORCE
 	mkdir -p build/filesystem/
 	$(HOST_CARGO) build --manifest-path redoxfs/Cargo.toml --release --bin redoxfs