diff --git a/Makefile b/Makefile
index a0d4256..be90860 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,13 @@
 # ENV
 
-BUILD_DIR ?= build
+BUILD_DIR ?= $(PWD)/build
+FORGE_SRC ?= $(PWD)/forge-steel
 TARGET ?= forge
 RUN_ARGS ?= --project=$(PWD)/project -is=576
-VERSION ?= invar-$(shell grep -Eo '[0-9]+\.[0-9]+\.[0-9]+' forge-steel/configure.ac)
+VERSION ?= invar-$(shell grep -Eo '[0-9]+\.[0-9]+\.[0-9]+' $(FORGE_SRC)/configure.ac)
+SOURCES ?= $(FORGE_SRC)/src/*.h $(FORGE_SRC)/src/*.c $(FORGE_SRC)/hashmap.c/hashmap.c $(FORGE_SRC)/log.c/src/log.c
+CFLAGS ?= -Ofast -Ofast -march=native -flto -funroll-loops -fprefetch-loop-arrays -fno-exceptions -fopenmp -I$(FORGE_SRC)/include -DGLFW_INCLUDE_NONE -DGLFW_NATIVE_INCLUDE_NONE -DLOG_USE_COLOR -DVERSION=\"$(VERSION)\" -DOPENGL_MAJOR_VERSION=3 -DOPENGL_MINOR_VERSION=1
+LDLIBS ?= -lm -lGL -lglfw -lasound
 
 # FILES
 
@@ -21,22 +25,7 @@ forge-steel/include/linmath.h:
 
 $(BUILD_DIR)/$(TARGET): forge-steel/src/main.c forge-steel/hashmap.c/hashmap.c forge-steel/log.c/src/log.c forge-steel/include/linmath.h
 	mkdir -p $(BUILD_DIR)
-	gcc \
-		forge-steel/src/*.h forge-steel/src/*.c \
-		-Iforge-steel/include \
-		forge-steel/hashmap.c/hashmap.c \
-		forge-steel/log.c/src/log.c \
-		-lm -lGL -lglfw -lasound \
-		-Wall -Wextra \
-		-Wno-format-truncation \
-		-DGLFW_INCLUDE_NONE \
-		-DGLFW_NATIVE_INCLUDE_NONE \
-		-DLOG_USE_COLOR \
-		-DVERSION=\"$(VERSION)\" \
-		-DOPENGL_MAJOR_VERSION=3 \
-		-DOPENGL_MINOR_VERSION=1 \
-		-o build/$(TARGET) \
-		-O3
+	$(CC) $(SOURCES) $(CFLAGS) $(LDLIBS) -o $(BUILD_DIR)/$(TARGET)
 
 # ACTIONS
 
@@ -49,20 +38,20 @@ apt-install:
 	sudo apt update
 	sudo apt install -y weston kitty libglfw3-dev libgl-dev libasound2-dev libv4l-dev
 
-.PHONY: setup-weston:
+.PHONY: setup-weston
 setup-weston:
-	ln -s $(PWD)/system/weston.ini $(XDG_CONFIG_HOME)/weston.ini
+	ln -s $(topsrscdir)/system/weston.ini $(XDG_CONFIG_HOME)/weston.ini
 
-.PHONY: setup-system-services:
+.PHONY: setup-system-services
 setup-system-services:
-	sudo ln -s $(PWD)/system/getty@tty1.service /etc/systemd/system/getty@tty1.service
+	sudo ln -s $(topsrscdir)/system/getty@tty1.service /etc/systemd/system/getty@tty1.service
 	sudo systemctl daemon-reload
 	sudo systemctl enable getty@tty1.service
 
-.PHONY: setup-user-services:
+.PHONY: setup-user-services
 setup-user-services:
-	sudo ln -s $(PWD)/system/weston.service /etc/systemd/user/weston.service
-	sudo ln -s $(PWD)/system/weston.socket /etc/systemd/user/weston.socket
+	sudo ln -s $(topsrscdir)/system/weston.service /etc/systemd/user/weston.service
+	sudo ln -s $(topsrscdir)/system/weston.socket /etc/systemd/user/weston.socket
 	systemctl --user daemon-reload
 	systemctl --user enable weston seatd
 
@@ -72,7 +61,7 @@ install: remove-passwd apt-install setup-weston setup-system-services setup-user
 
 .PHONY: clean
 clean:
-	rm -rf $(BUILD_DIR)
+	$(RM) -r $(BUILD_DIR)
 
 .PHONY: build
 build: $(BUILD_DIR)/$(TARGET)