diff --git a/make/ise.mk b/make/ise.mk
index ad68f59..95d13ca 100644
--- a/make/ise.mk
+++ b/make/ise.mk
@@ -13,13 +13,17 @@ NETLIST_DIR ?= ./
 MAP_EFFORT ?= high
 PAR_EFFORT ?= high
 
+BUILD_DIR := build
+XST_DIR := xst/tmp
+DIRS := $(BUILD_DIR) $(XST_DIR)
+
 # Netlist
 $(PRJ).ngc: $(DIRS) $(PREQ) ./project/$(PRJ).ucf
 	xst -intstyle xflow -ifn ./project/$(PRJ).xst
 
 # Translate
 $(PRJ).ngd: $(NETLISTS) $(PRJ).ngc ./project/$(PRJ).ucf
-	ngdbuild -p $(DEVICE) -sd $(NETLIST_DIR) -dd _ngo -nt timestamp -uc ./project/$(PRJ).ucf $(PRJ).ngc $(PRJ).ngd
+	ngdbuild -dd $(BUILD_DIR) -p $(DEVICE) -sd $(NETLIST_DIR) -dd _ngo -nt timestamp -uc ./project/$(PRJ).ucf $(PRJ).ngc $(PRJ).ngd
 
 # Map
 $(PRJ)_map.ncd: $(PRJ).ngd
diff --git a/projects/mips_sys/ise101/mips_sys/Makefile b/projects/mips_sys/ise101/mips_sys/Makefile
index 9a85ec6..4092b2a 100644
--- a/projects/mips_sys/ise101/mips_sys/Makefile
+++ b/projects/mips_sys/ise101/mips_sys/Makefile
@@ -1,10 +1,11 @@
-PRJ := mips_sys
-PREQ := ./project/$(PRJ).prj ./project/$(PRJ).xst ./project/$(PRJ).lso
-DEVICE := "xc4vsx35-ff668-10"
-DIRS := ./xst/tmp
+PRJDIR := ./project
 
-NETLIST_DIR := ../../../../lib/CPUs/MIPS/syn/ise101
+PRJ := mips_sys
+PREQ := $(PRJDIR)/$(PRJ).prj $(PRJDIR)/$(PRJ).xst $(PRJDIR)/$(PRJ).lso
+DEVICE := "xc4vsx35-ff668-10"
+
+NETLIST_DIR := $(VHDL_HOME)/lib/CPUs/MIPS/syn/ise101
 NETLISTS := $(NETLIST_DIR)/mips_top.ngc
 
-include ../../../../make/ise.mk
+include $(VHDL_HOME)/make/ise.mk