diff --git a/Makefile b/Makefile
index fb447785..325976b0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,27 +1,24 @@
 REGION ?= EUR
 
 ifeq ($(REGION), EUR)
-	BUILD_SUBDIR := eur
-else ifeq ($(REGION), USA)
-	BUILD_SUBDIR := usa
-else ifeq ($(REGION), JPN)
-	BUILD_SUBDIR := jpn
+	TARGET_SUBDIR := eur
 else
 	$(error Unknown region '$(REGION)')
 endif
 
-ROOT      := $(shell pwd)
-BUILD_DIR := $(ROOT)/build/$(BUILD_SUBDIR)
-TOOLS_DIR := $(ROOT)/tools
-LCF_FILE  := $(BUILD_DIR)/arm9_linker_script.lcf
-OBJS_FILE := $(BUILD_DIR)/arm9_objects.txt
+ROOT       := $(shell pwd)
+BUILD_DIR  := $(ROOT)/build
+TARGET_DIR := $(BUILD_DIR)/$(TARGET_SUBDIR)
+TOOLS_DIR  := $(ROOT)/tools
+LCF_FILE   := $(BUILD_DIR)/arm9_linker_script.lcf
+OBJS_FILE  := $(BUILD_DIR)/arm9_objects.txt
 
 ASM_FILES := $(wildcard asm/*.s)
 CXX_FILES := $(wildcard src/*.cpp)
-ASM_OBJS = $(ASM_FILES:%.s=$(BUILD_DIR)/%.o)
-CXX_OBJS = $(CXX_FILES:%.cpp=$(BUILD_DIR)/%.o)
+ASM_OBJS = $(ASM_FILES:%.s=$(TARGET_DIR)/%.o)
+CXX_OBJS = $(CXX_FILES:%.cpp=$(TARGET_DIR)/%.o)
 
-OV_BINS := $(wildcard $(BUILD_DIR)/overlays/*.bin)
+OV_BINS := $(wildcard $(TARGET_DIR)/overlays/*.bin)
 OV_LZS = $(OV_BINS:%.bin=%.lz)
 
 MW_VER     := 2.0/sp1p5
@@ -47,7 +44,7 @@ arm9: setup $(ASM_OBJS) lcf link
 
 .PHONY: setup
 setup:
-	mkdir -p $(BUILD_DIR)/overlays
+	mkdir -p $(TARGET_DIR)/overlays
 
 .PHONY: clean
 clean:
@@ -57,21 +54,21 @@ clean:
 lcf: $(TOOLS_DIR)/lcf.py
 	python $(TOOLS_DIR)/lcf.py
 
-$(ASM_OBJS): $(BUILD_DIR)/%.o: %.s
+$(ASM_OBJS): $(TARGET_DIR)/%.o: %.s
 	mkdir -p $(dir $@)
 	$(MW_ASM) $(ASM_FLAGS) $< -o $@
 
-$(CXX_OBJS): $(BUILD_DIR)/%.o: %.cpp
+$(CXX_OBJS): $(TARGET_DIR)/%.o: %.cpp
 	mkdir -o $(dir $@)
 	$(MW_CC) $(CC_FLAGS) $< -o $@
 
 .PHONY: link
 link:
-	cd $(BUILD_DIR) && LM_LICENSE_FILE=$(MW_LICENSE) $(MW_LD) $(LD_FLAGS) $(LCF_FILE) @$(OBJS_FILE)
+	cd $(TARGET_DIR) && LM_LICENSE_FILE=$(MW_LICENSE) $(MW_LD) $(LD_FLAGS) $(LCF_FILE) @$(OBJS_FILE)
 
 .PHONY: compress
 compress: $(OV_LZS)
-	$(TOOLS_DIR)/compress/compress -s 0x4000 -i $(BUILD_DIR)/arm9.bin -o $(BUILD_DIR)/arm9.lz
+	$(TOOLS_DIR)/compress/compress -s 0x4000 -i $(TARGET_DIR)/arm9.bin -o $(TARGET_DIR)/arm9.lz
 
 $(OV_LZS): %.lz: %.bin
 	$(TOOLS_DIR)/compress/compress -p -i $< -o $@