diff --git a/Makefile b/Makefile
index d612d00c4..8907c5bf9 100755
--- a/Makefile
+++ b/Makefile
@@ -7,26 +7,26 @@ endif
 
 OS:=$(shell uname -s)
 
-ifeq ($(NPROCS),)
-	NPROCS:=1
+ifeq ($(JOBS),)
+	JOBS:=1
 	ifeq ($(OS),Linux)
-		NPROCS:=$(shell grep -c ^processor /proc/cpuinfo)
+		JOBS:=$(shell grep -c ^processor /proc/cpuinfo)
 	endif
 	ifeq ($(OS),Darwin)
-		NPROCS:=$(shell sysctl -n hw.ncpu)
+		JOBS:=$(shell sysctl -n hw.ncpu)
 	endif
 endif
 
 all: mapnik
 
 install:
-	@python scons/scons.py -j$(NPROCS) --config=cache --implicit-cache --max-drift=1 install
+	@python scons/scons.py -j$(JOBS) --config=cache --implicit-cache --max-drift=1 install
 
 mapnik:
-	@python scons/scons.py -j$(NPROCS) --config=cache --implicit-cache --max-drift=1
+	@python scons/scons.py -j$(JOBS) --config=cache --implicit-cache --max-drift=1
 
 clean:
-	@python scons/scons.py -j$(NPROCS) -c --config=cache --implicit-cache --max-drift=1
+	@python scons/scons.py -j$(JOBS) -c --config=cache --implicit-cache --max-drift=1
 	@if test -e ".sconsign.dblite"; then rm ".sconsign.dblite"; fi
 	@if test -e "config.log"; then rm  "config.log"; fi
 	@if test -e ".sconf_temp/"; then rm -r ".sconf_temp/"; fi
@@ -46,7 +46,7 @@ rebuild:
 	make uninstall && make clean && time make && make install
 
 uninstall:
-	@python scons/scons.py -j$(NPROCS) --config=cache --implicit-cache --max-drift=1 uninstall
+	@python scons/scons.py -j$(JOBS) --config=cache --implicit-cache --max-drift=1 uninstall
 
 test:
 	@ ./run_tests