diff --git a/Makefile b/Makefile
index d476bc3..fc2edf2 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,8 @@ EXTENSION = .$(shell echo $(FORMAT) |tr '[:upper:]' '[:lower:]')
 
 DAY_IN_SECS = 86400
 
+BUILD_DIR = web
+
 all:
 
 cpu.rrd:
@@ -92,7 +94,7 @@ update: update_cpu update_load update_mem update_net
 run:
 	while true; do make update; sleep $(STEP); done
 
-cpu-daily$(EXTENSION): cpu.rrd
+$(BUILD_DIR)/cpu-daily$(EXTENSION): cpu.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
 		DEF:user=$<:user:AVERAGE \
 		DEF:nice=$<:nice:AVERAGE \
@@ -115,7 +117,7 @@ cpu-daily$(EXTENSION): cpu.rrd
 		AREA:gnice#$(DANGER9):gnice:STACK \
 		AREA:idle#$(SUCCESS):idle:STACK
 
-load-daily$(EXTENSION): load.rrd
+$(BUILD_DIR)/load-daily$(EXTENSION): load.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
 		DEF:ldavg-1=$<:ldavg-1:AVERAGE \
 		DEF:ldavg-5=$<:ldavg-5:AVERAGE \
@@ -124,7 +126,7 @@ load-daily$(EXTENSION): load.rrd
 		LINE1:ldavg-5#$(INFO2):ldavg-5 \
 		LINE1:ldavg-15#$(INFO3):ldavg-15
 
-mem-daily$(EXTENSION): mem.rrd
+$(BUILD_DIR)/mem-daily$(EXTENSION): mem.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
 		DEF:kbmemfree=$<:kbmemfree:AVERAGE \
 		DEF:kbbuffers=$<:kbbuffers:AVERAGE \
@@ -136,7 +138,7 @@ mem-daily$(EXTENSION): mem.rrd
 		AREA:kbbuffers#$(DANGER4):kbbuffers:STACK \
 		AREA:kbmemfree#$(SUCCESS):kbmemfree:STACK
 
-net-daily$(EXTENSION): net.rrd
+$(BUILD_DIR)/net-daily$(EXTENSION): net.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
 		DEF:rbytes=$<:rbytes:AVERAGE \
 		DEF:tbytes=$<:tbytes:AVERAGE \
@@ -144,4 +146,4 @@ net-daily$(EXTENSION): net.rrd
 		AREA:rbytes#$(DANGER):rbytes \
 		AREA:ntbytes#$(SUCCESS):tbytes
 
-graph: cpu-daily$(EXTENSION) load-daily$(EXTENSION) mem-daily$(EXTENSION) net-daily$(EXTENSION)
+graph: $(BUILD_DIR)/cpu-daily$(EXTENSION) $(BUILD_DIR)/load-daily$(EXTENSION) $(BUILD_DIR)/mem-daily$(EXTENSION) $(BUILD_DIR)/net-daily$(EXTENSION)