1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 94db1c853a..6d8f6cb07d 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ CMAKE_INSTALL_PREFIX := $(shell echo $(CMAKE_EXTRA_FLAGS) | 2>/dev/null \
     grep -o 'CMAKE_INSTALL_PREFIX=[^ ]\+' | cut -d '=' -f2)
 endif
 ifneq (,$(CMAKE_INSTALL_PREFIX))
-CMAKE_EXTRA_FLAGS += -DCMAKE_INSTALL_PREFIX=$(CMAKE_INSTALL_PREFIX)
+override CMAKE_EXTRA_FLAGS += -DCMAKE_INSTALL_PREFIX=$(CMAKE_INSTALL_PREFIX)
 
 checkprefix:
 	@if [ -f build/.ran-cmake ]; then \