diff --git a/Makefile b/Makefile
index d5c7146326..106e8667d9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,10 @@
 NANT	= $(shell if test "$$EMACS" = "t" ; then echo "nant"; else echo "./nant-color"; fi)
 
-all:
-	# @export PATH=/usr/local/bin:$(PATH)
+prebuild:
 	./runprebuild.sh
+
+all: prebuild
+	# @export PATH=/usr/local/bin:$(PATH)
 	${NANT}
 	find OpenSim -name \*.mdb -exec cp {} bin \; 
 
@@ -10,10 +12,10 @@ clean:
 	# @export PATH=/usr/local/bin:$(PATH)
 	${NANT} clean
 
-test:
+test: prebuild
 	${NANT} test
 
-test-xml:
+test-xml: prebuild
 	${NANT} test-xml
 
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