Fix build test rules

Author: woodrush

Makefile

@@ -66,7 +66,8 @@ test: test-compile
 
 pdf: $(target_pdf)
 
-.PHONY:build
+build: $(LAMBDA8CC)
+
 
 #================================================================
 # Build the PDF
@@ -228,11 +229,6 @@ $(LAMBDA8CCZIP):
 	cd out; unzip ../bin/lambda-8cc.lam.zip
 
 
-build: $(LAMBDA8CC) $(LAMBDA8CCZIP)
-	diff $^ || exit 1
-	@echo "Build check passed."
-
-
 #================================================================
 # Build lambda-8cc.lazy (WIP)
 #================================================================