diff --git a/.gitignore b/.gitignore
index df5185d..59a9208 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
 *.pyc
-eonticket/build
 battle-e/build
+decoration/build
+eonticket/build
+giftpokemon/build
+ribbons/build
diff --git a/bin/nedc/v1.4.1/raw2bmp b/bin/nedc/v1.4.1/raw2bmp
new file mode 100755
index 0000000..ced7396
Binary files /dev/null and b/bin/nedc/v1.4.1/raw2bmp differ
diff --git a/decoration/Makefile b/decoration/Makefile
index 3e85878..9ae1971 100644
--- a/decoration/Makefile
+++ b/decoration/Makefile
@@ -1,64 +1,55 @@
-all: 08-O001-EN.raw
-.SECONDARY: 08-O002-EN.z80
+all: build/08-O001-EN-01.raw verify
 
-decoration-%.tx: decoration.asm
+.PHONY: verify
+verify: build/08-O001-EN.z80 
+	md5sum --check decoration.md5
+
+build/prologue-%.tx: prologue.asm
 	python3 ../scripts/regionalize.py $< $@ $* $*
-decoration-%.o: decoration-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-decoration-%.gbc: decoration-%.o
+build/prologue-%.o: build/prologue-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -o $@ $<
+build/prologue-%.gbc: build/prologue-%.o
 	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-decoration-%.bin: decoration-%.gbc
+build/prologue-%.bin: build/prologue-%.gbc
 	python3 ../scripts/stripgbc.py $< $@
-decoration-%.mev: decoration-%.bin
+
+.PRECIOUS: build/prologue-%.tx build/prologue-%.o build/prologue-%.gbc build/prologue-%.bin
+
+build/decoration-%.tx: decoration.asm
+	python3 ../scripts/regionalize.py $< $@ $* $*
+build/decoration-%.o: build/decoration-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -o $@ $<
+build/decoration-%.gbc: build/decoration-%.o
+	../bin/rgbds/v0.9.1/rgblink -o $@ $<
+build/decoration-%.bin: build/decoration-%.gbc
+	python3 ../scripts/stripgbc.py $< $@
+build/decoration-%.mev: build/decoration-%.bin
 	python3 ../scripts/checksum_regi.py $< $@
 
-prologue-%.tx: prologue.asm
-	python3 ../scripts/regionalize.py $< $@ $* $*
-prologue-%.o: prologue-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-prologue-%.gbc: prologue-%.o
-	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-prologue-%.bin: prologue-%.gbc
-	python3 ../scripts/stripgbc.py $< $@
+.PRECIOUS: build/decoration-%.tx build/decoration-%.o build/decoration-%.gbc build/decoration-%.bin build/decoration-%.mev
 
-08-O001-%.tx: 08-O001.asm decoration-%.mev prologue-%.bin
+build/08-O001-%.tx: 08-O001.asm build/decoration-%.mev build/prologue-%.bin
 	python3 ../scripts/ereadertext.py $< $@ $*
-08-O001-%.o: 08-O001-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-08-O001-%.gbc: 08-O001-%.o
+build/08-O001-%.o: build/08-O001-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -I build -o $@ $<
+build/08-O001-%.gbc: build/08-O001-%.o
 	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-08-O001-%.z80: 08-O001-%.gbc
+build/08-O001-%.z80: build/08-O001-%.gbc
 	python3 ../scripts/stripgbc.py $< $@
-08-O001-%.vpk: 08-O001-%.z80
+build/08-O001-%.vpk: build/08-O001-%.z80
 	../bin/nedc/v1.4.1/nevpk -c -i $< -o $@
-08-O001-%.raw: 08-O001-%.vpk
-	../bin/nedc/v1.4.1/nedcmake -i $< -o $@ -type 1 -region 1
-	mv $@-01.raw $@
+build/08-O001-%-01.raw: build/08-O001-%.vpk
+	../bin/nedc/v1.4.1/nedcmake -i $< -o $(subst -01.raw,,$@) -type 1 -region 1
 
-decoration-tickets-%.tx: decoration-tickets.asm
-	python3 ../scripts/regionalize.py $< $@ $* $*
-decoration-tickets-%.o: decoration-tickets-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-decoration-tickets-%.gbc: decoration-tickets-%.o
-	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-decoration-tickets-%.bin: decoration-tickets-%.gbc
-	python3 ../scripts/stripgbc.py $< $@
-decoration-tickets-%.mev: decoration-tickets-%.bin
-	python3 ../scripts/checksum_regi.py $< $@
+.PRECIOUS: build/08-O001-%.tx build/08-O001-%.o build/08-O001-%.gbc build/08-O001-%.z80 build/08-O001-%.vpk build/08-O001-%-01.raw
 
-08-O002-%.tx: 08-O002.asm decoration-tickets-%.mev prologue-%.bin
-	python3 ../scripts/ereadertext.py $< $@ $*
-08-O002-%.o: 08-O002-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-08-O002-%.gbc: 08-O002-%.o
-	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-08-O002-%.z80: 08-O002-%.gbc
-	python3 ../scripts/stripgbc.py $< $@
-08-O002-%.vpk: 08-O002-%.z80
-	../bin/nedc/v1.4.1/nevpk -c -i $< -o $@
-08-O002-%.raw: 08-O002-%.vpk
-	../bin/nedc/v1.4.1/nedcmake -i $< -o $@ -type 1 -region 1
-	mv $@-01.raw $@
+# Automatically create build dirs if missing
+BUILD_DIRS=build
+$(info $(shell mkdir -p $(BUILD_DIRS)))
 
+.PHONY: clean
 clean:
-	rm -f *.tx *.o *.gbc *.z80 *.bin *.mev *.vpk *.raw
+	rm -rf build && mkdir -p $(BUILD_DIRS)
+
+# Automatically generated dep files
+-include build/*.d
diff --git a/decoration/decoration.md5 b/decoration/decoration.md5
new file mode 100644
index 0000000..f2474e0
--- /dev/null
+++ b/decoration/decoration.md5
@@ -0,0 +1 @@
+27d75f6d5fe2124fa3da758b69a9f96e  build/08-O001-EN.z80
diff --git a/giftpokemon/Makefile b/giftpokemon/Makefile
index 75eca45..63b2c4e 100644
--- a/giftpokemon/Makefile
+++ b/giftpokemon/Makefile
@@ -1,42 +1,57 @@
-all: 00-G000-EN.raw
+all: build/00-G000-EN-01.raw verify
 
+.PHONY: verify
+verify: build/00-G000-EN.z80 
+	md5sum --check giftpokemon.md5
 
-giftpokemon-%.tx: giftpokemon.asm
+build/prologue-%.tx: prologue.asm
 	python3 ../scripts/regionalize.py $< $@ $* $*
-giftpokemon-%.o: giftpokemon-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-giftpokemon-%.gbc: giftpokemon-%.o
+build/prologue-%.o: build/prologue-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -o $@ $<
+build/prologue-%.gbc: build/prologue-%.o
 	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-giftpokemon1-%.bin: giftpokemon-%.gbc
+build/prologue-%.bin: build/prologue-%.gbc
 	python3 ../scripts/stripgbc.py $< $@
-giftpokemon-%.bin: giftpokemon1-%.bin
+
+.PRECIOUS: build/prologue-%.tx build/prologue-%.o build/prologue-%.gbc build/prologue-%.bin
+
+build/giftpokemon-%.tx: giftpokemon.asm
+	python3 ../scripts/regionalize.py $< $@ $* $*
+build/giftpokemon-%.o: build/giftpokemon-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -o $@ $<
+build/giftpokemon-%.gbc: build/giftpokemon-%.o
+	../bin/rgbds/v0.9.1/rgblink -o $@ $<
+build/giftpokemon1-%.bin: build/giftpokemon-%.gbc
+	python3 ../scripts/stripgbc.py $< $@
+build/giftpokemon-%.bin: build/giftpokemon1-%.bin
 	python3 ../scripts/pokemonstructure.py $< $@
-giftpokemon-%.mev: giftpokemon-%.bin
+build/giftpokemon-%.mev: build/giftpokemon-%.bin
 	python3 ../scripts/checksum.py $< $@
 
-prologue-%.tx: prologue.asm
-	python3 ../scripts/regionalize.py $< $@ $* $*
-prologue-%.o: prologue-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-prologue-%.gbc: prologue-%.o
-	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-prologue-%.bin: prologue-%.gbc
-	python3 ../scripts/stripgbc.py $< $@
+.PRECIOUS: build/giftpokemon-%.tx build/giftpokemon-%.o build/giftpokemon-%.gbc build/giftpokemon1-%.bin build/giftpokemon-%.bin build/giftpokemon-%.mev
 
-00-G000-%.tx: 00-G000.asm giftpokemon-%.mev prologue-%.bin
+build/00-G000-%.tx: 00-G000.asm build/giftpokemon-%.mev build/prologue-%.bin
 	python3 ../scripts/ereadertext.py $< $@ $*
-00-G000-%.o: 00-G000-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-00-G000-%.gbc: 00-G000-%.o
+build/00-G000-%.o: build/00-G000-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -I build -o $@ $<
+build/00-G000-%.gbc: build/00-G000-%.o
 	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-00-G000-%.z80: 00-G000-%.gbc
+build/00-G000-%.z80: build/00-G000-%.gbc
 	python3 ../scripts/stripgbc.py $< $@
-00-G000-%.vpk: 00-G000-%.z80
+build/00-G000-%.vpk: build/00-G000-%.z80
 	../bin/nedc/v1.4/nevpk -c -i $< -o $@
-00-G000-%.raw: 00-G000-%.vpk
-	../bin/nedc/v1.4/nedcmake -i $< -o $@ -type 1 -region 1
-	mv $@-01.raw $@
+build/00-G000-%.raw: build/00-G000-%.vpk
+	../bin/nedc/v1.4/nedcmake -i $< -o $(subst -01.raw,,$@) -type 1 -region 1
 
+.PRECIOUS: build/00-G000-%.tx build/00-G000-%.o build/00-G000-%.gbc build/00-G000-%.z80 build/00-G000-%.vpk build/00-G000-%-01.raw
 
+# Automatically create build dirs if missing
+BUILD_DIRS=build
+$(info $(shell mkdir -p $(BUILD_DIRS)))
+
+.PHONY: clean
 clean:
-	rm -f *.tx *.o *.gbc *.z80 *.bin *.mev *.vpk *.raw
+	rm -rf build && mkdir -p $(BUILD_DIRS)
+
+# Automatically generated dep files
+-include build/*.d
diff --git a/giftpokemon/giftpokemon.md5 b/giftpokemon/giftpokemon.md5
new file mode 100644
index 0000000..af6e33b
--- /dev/null
+++ b/giftpokemon/giftpokemon.md5
@@ -0,0 +1 @@
+a3806da2d60574ef44a70bd34e6b8f45  build/00-G000-EN.z80
diff --git a/ribbons/Makefile b/ribbons/Makefile
index e1ce6ed..28e4925 100644
--- a/ribbons/Makefile
+++ b/ribbons/Makefile
@@ -1,40 +1,55 @@
-all: 00-R000-EN.raw
+all: build/00-R000-EN-01.raw verify
 
+.PHONY: verify
+verify: build/00-R000-EN.z80 
+	md5sum --check ribbons.md5
 
-ribbon-%.tx: ribbon.asm
+build/prologue-%.tx: prologue.asm
 	python3 ../scripts/regionalize.py $< $@ $* $*
-ribbon-%.o: ribbon-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-ribbon-%.gbc: ribbon-%.o
+build/prologue-%.o: build/prologue-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -o $@ $<
+build/prologue-%.gbc: build/prologue-%.o
 	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-ribbon-%.bin: ribbon-%.gbc
+build/prologue-%.bin: build/prologue-%.gbc
 	python3 ../scripts/stripgbc.py $< $@
-ribbon-%.mev: ribbon-%.bin
+
+.PRECIOUS: build/prologue-%.tx build/prologue-%.o build/prologue-%.gbc build/prologue-%.bin
+
+build/ribbon-%.tx: ribbon.asm
+	python3 ../scripts/regionalize.py $< $@ $* $*
+build/ribbon-%.o: build/ribbon-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -o $@ $<
+build/ribbon-%.gbc: build/ribbon-%.o
+	../bin/rgbds/v0.9.1/rgblink -o $@ $<
+build/ribbon-%.bin: build/ribbon-%.gbc
+	python3 ../scripts/stripgbc.py $< $@
+build/ribbon-%.mev: build/ribbon-%.bin
 	python3 ../scripts/checksum.py $< $@
 
-prologue-%.tx: prologue.asm
-	python3 ../scripts/regionalize.py $< $@ $* $*
-prologue-%.o: prologue-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-prologue-%.gbc: prologue-%.o
-	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-prologue-%.bin: prologue-%.gbc
-	python3 ../scripts/stripgbc.py $< $@
+.PRECIOUS: build/ribbon-%.tx build/ribbon-%.o build/ribbon-%.gbc build/ribbon-%.bin build/ribbon-%.mev
 
-00-R000-%.tx: 00-R000.asm ribbon-%.mev prologue-%.bin
+build/00-R000-%.tx: 00-R000.asm build/ribbon-%.mev build/prologue-%.bin
 	python3 ../scripts/ereadertext.py $< $@ $*
-00-R000-%.o: 00-R000-%.tx
-	../bin/rgbds/v0.9.1/rgbasm -o $@ $<
-00-R000-%.gbc: 00-R000-%.o
+build/00-R000-%.o: build/00-R000-%.tx
+	../bin/rgbds/v0.9.1/rgbasm -M $@.d -I build -o $@ $<
+build/00-R000-%.gbc: build/00-R000-%.o
 	../bin/rgbds/v0.9.1/rgblink -o $@ $<
-00-R000-%.z80: 00-R000-%.gbc
+build/00-R000-%.z80: build/00-R000-%.gbc
 	python3 ../scripts/stripgbc.py $< $@
-00-R000-%.vpk: 00-R000-%.z80
+build/00-R000-%.vpk: build/00-R000-%.z80
 	../bin/nedc/v1.4/nevpk -c -i $< -o $@
-00-R000-%.raw: 00-R000-%.vpk
-	../bin/nedc/v1.4/nedcmake -i $< -o $@ -type 1 -region 1
-	mv $@-01.raw $@
+build/00-R000-%.raw: build/00-R000-%.vpk
+	../bin/nedc/v1.4/nedcmake -i $< -o $(subst -01.raw,,$@) -type 1 -region 1
 
+.PRECIOUS: build/00-R000-%.tx build/00-R000-%.o build/00-R000-%.gbc build/00-R000-%.z80 build/00-R000-%.vpk build/00-R000-%-01.raw
 
+# Automatically create build dirs if missing
+BUILD_DIRS=build
+$(info $(shell mkdir -p $(BUILD_DIRS)))
+
+.PHONY: clean
 clean:
-	rm -f *.tx *.o *.gbc *.z80 *.bin *.mev *.vpk *.raw
+	rm -rf build && mkdir -p $(BUILD_DIRS)
+
+# Automatically generated dep files
+-include build/*.d
diff --git a/ribbons/ribbons.md5 b/ribbons/ribbons.md5
new file mode 100644
index 0000000..61e5012
--- /dev/null
+++ b/ribbons/ribbons.md5
@@ -0,0 +1 @@
+9d5ab2151daa2bd73c6dcc6fddfc1e01  build/00-R000-EN.z80