diff --git a/Makefile b/Makefile
index f1c2246..dc986f4 100644
--- a/Makefile
+++ b/Makefile
@@ -2,22 +2,22 @@ IN_IMGS  := imgs
 OUT_IMGS := out-imgs
 BIN      := build/seam-carving --silent
 
-images: images-ign images-birds
+images: images-ign images-birds images-boat
 
 
 images-dir:
 	mkdir -p $(OUT_IMGS)
 
-images-birds: build/seam-carving
+images-birds: build/seam-carving images-dir
 	$(BIN) -s $(IN_IMGS)/birds.jpg -m $(IN_IMGS)/birds-mask.jpg -o $(OUT_IMGS)/vertical-birds.jpg   -u --vertical
 	$(BIN) -s $(IN_IMGS)/birds.jpg -m $(IN_IMGS)/birds-mask.jpg -o $(OUT_IMGS)/horizontal-birds.jpg -u
 
-images-ign: build/seam-carving
+images-ign: build/seam-carving images-dir
 	$(BIN) -s $(IN_IMGS)/ign-circled.png -m $(IN_IMGS)/ign-mask.jpg -o $(OUT_IMGS)/ign-maxstep3-seams.jpg -u --max-step 3 --show-seams
 	$(BIN) -s $(IN_IMGS)/ign-circled.png -m $(IN_IMGS)/ign-mask.jpg -o $(OUT_IMGS)/ign-maxstep3.jpg       -u --max-step 3
 	$(BIN) -s $(IN_IMGS)/ign-circled.png -m $(IN_IMGS)/ign-mask.jpg -o $(OUT_IMGS)/ign-maxstep15.jpg      -u --max-step 15
 
-images-boat: build/seam-carving
+images-boat: build/seam-carving images-dir
 	$(BIN) -s $(IN_IMGS)/boat.jpg  -o $(OUT_IMGS)/boat-seams.jpg -n 350 --show-seams
 	$(BIN) -s $(IN_IMGS)/boat.jpg  -o $(OUT_IMGS)/boat.jpg -n 350