@@ 27,7 27,7 @@ set(BUILD_PREFIX ${CMAKE_BINARY_DIR})
 set_property(DIRECTORY PROPERTY EP_BASE ${BUILD_PREFIX})
 
 externalproject_add(o2
-	GIT_REPOSITORY https://github.com/vnorilo/o2.git
+	URL https://github.com/vnorilo/o2/archive/refs/heads/master.zip
 	BUILD_COMMAND ""
 	INSTALL_COMMAND "")
 

          
@@ 38,6 38,7 @@ if(KRONOS_BUILD_LLVM)
 	# Download and build LLVM
 	externalproject_add(llvm
 		URL "https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-6.0.1.zip"
+		URL_HASH "MD5=c1f7e74075e1e203c1e41d6f1e04227e"
 		SOURCE_SUBDIR llvm
 		INSTALL_COMMAND ""
 		CMAKE_ARGS ${SUPERBUILD_TYPE}