diff --git a/Makefile b/Makefile
index 284eb3a..611ebc6 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,11 @@ STATIC_OUT := ${OUT}-${VERSION}
 PACKAGE_PATH := dist/${OUT}-${VERSION}
 BUILDOPTS :=
 
+SHA256_CMD = sha256sum
+ifeq (, $(shell which $(SHA256_CMD)))
+	SHA256_CMD = shasum -a 256
+endif
+
 server:
 	go build -v -o ${OUT} -ldflags="-X main.applicationVersion=${VERSION}" ${BUILDOPTS} ${PKG}
 
@@ -84,12 +89,12 @@ _prepare_package:
 	rm -rf ${PACKAGE_PATH}
 	mkdir -p ${PACKAGE_PATH}
 	rsync ui json_schemas ${PACKAGE_PATH}/ -a --delete-after
-	cp -ua README.md LICENSE.txt ${PACKAGE_PATH}/
+	rsync -ua README.md LICENSE.txt ${PACKAGE_PATH}/
 
 _finish_package:
 	rm -r ${PACKAGE_PATH}
 	rm -f ${PACKAGE_PATH}.sha256
-	sha256sum ${PACKAGE_PATH}* | tee ${PACKAGE_PATH}.sha256
+	$(SHA256_CMD) ${PACKAGE_PATH}* | tee ${PACKAGE_PATH}.sha256
 
 _package_tar: static
 	tar -C $(dir ${PACKAGE_PATH}) -zcf $(PWD)/${PACKAGE_PATH}-${GOOS}.tar.gz $(notdir ${PACKAGE_PATH})