--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,11 +80,7 @@
   ExternalProject_add(
     mimalloc
     PREFIX mimalloc
-    GIT_REPOSITORY https://github.com/microsoft/mimalloc
-    GIT_TAG v2.2.3
-    # just download, we compile it as part of each stage as it is small
-    CONFIGURE_COMMAND ""
-    BUILD_COMMAND ""
+    SOURCE_DIR "MIMALLOC-SRC"
     INSTALL_COMMAND ""
   )
   list(APPEND EXTRA_DEPENDS mimalloc)
 endif()