diff --git a/makefiles/duckdb_extension.Makefile b/makefiles/duckdb_extension.Makefile
index b8c7f4d..6f01766 100644
--- a/makefiles/duckdb_extension.Makefile
+++ b/makefiles/duckdb_extension.Makefile
@@ -24,6 +24,11 @@ ifneq ($(CXX),g++)
 endif
 endif
 
+#### Core extensions, allows easily building one of the core extensions
+ifneq ($(CORE_EXTENSIONS),)
+	CORE_EXTENSION_VAR:=-DCORE_EXTENSIONS="$(CORE_EXTENSIONS)"
+endif
+
 #### OSX config
 OSX_BUILD_FLAG=
 ifneq (${OSX_BUILD_ARCH}, "")
@@ -53,7 +58,7 @@ endif
 #### Configuration for this extension
 EXTENSION_FLAGS=-DDUCKDB_EXTENSION_CONFIGS='${EXT_CONFIG}'
 
-BUILD_FLAGS=-DEXTENSION_STATIC_BUILD=1 $(EXTENSION_FLAGS) ${EXT_FLAGS} $(OSX_BUILD_FLAG) $(RUST_FLAGS) $(TOOLCHAIN_FLAGS) -DDUCKDB_EXPLICIT_PLATFORM='${DUCKDB_PLATFORM}' -DCUSTOM_LINKER=${CUSTOM_LINKER}
+BUILD_FLAGS=-DEXTENSION_STATIC_BUILD=1 $(EXTENSION_FLAGS) ${EXT_FLAGS} $(CORE_EXTENSION_VAR) $(OSX_BUILD_FLAG) $(RUST_FLAGS) $(TOOLCHAIN_FLAGS) -DDUCKDB_EXPLICIT_PLATFORM='${DUCKDB_PLATFORM}' -DCUSTOM_LINKER=${CUSTOM_LINKER}
 
 debug:
 	mkdir -p  build/debug