diff --git a/third-party/mimalloc/Makefile b/third-party/mimalloc/Makefile
index 13c20781b926..5b732db02605 100644
--- a/third-party/mimalloc/Makefile
+++ b/third-party/mimalloc/Makefile
@@ -18,7 +18,14 @@ CHPL_MIMALLOC_CFG_OPTIONS += \
 ifeq ($(strip $(CHPL_MAKE_HOST_TARGET)),--host)
 CHPL_MIMALLOC_CFG_OPTIONS += -DMI_BUILD_SHARED=ON -DMI_BUILD_STATIC=ON
 else
-CHPL_MIMALLOC_CFG_OPTIONS += -DMI_BUILD_SHARED=OFF -DMI_BUILD_STATIC=ON
+CHPL_MIMALLOC_CFG_OPTIONS += -DMI_BUILD_SHARED=OFF -DMI_BUILD_STATIC=ON -DMI_OVERRIDE=OFF
+endif
+
+# if DEBUG, build with debug info
+ifeq ($(DEBUG),1)
+CHPL_MIMALLOC_CFG_OPTIONS += -DCMAKE_BUILD_TYPE=Debug
+else
+CHPL_MIMALLOC_CFG_OPTIONS += -DCMAKE_BUILD_TYPE=Release
 endif