Makefile more robust

Makefile

@@ -27,18 +27,18 @@ uninstall:
 
 # eobuilder targets -- see http://repos.entrouvert.org/eobuilder.git/tree/README.rst
 dist-bzip2:
-	mkdir -p build/$(FULLNAME)
+	rm -rf build dist
+	mkdir -p build/$(FULLNAME) sdist
 	for i in *; do \
 		if [ "$$i" != "build" ]; then \
 			cp -R "$$i" build/$(NAME)-$(VERSION); \
 		fi; \
 	done
-	mkdir sdist
 	cd build && tar cfj ../sdist/$(FULLNAME).tar.bz2 .
 	rm -rf build
 
 clean:
-	rm -rf sdist
+	rm -rf sdist build
 
 version:
 	@(echo $(VERSION))