diff --git a/Makefile b/Makefile
index 4197435778f8..5b59bc0eb342 100644
--- a/Makefile
+++ b/Makefile
@@ -409,7 +409,7 @@ generate-files:
 
 wasm-extensions-mvp: ${EXTENSION_CONFIG_STEP}
 	mkdir -p build_emscripten/wasm_mvp
-	emcmake cmake -DDUCKDB_CUSTOM_PLATFORM=wasm_mvp -DBUILD_EXTENSIONS_ONLY=1 -Bbuild_emscripten/wasm_mvp
+	emcmake cmake -DDUCKDB_CUSTOM_PLATFORM=wasm_mvp -DBUILD_EXTENSIONS_ONLY=1 -Bbuild_emscripten/wasm_mvp ${CMAKE_VARS}
 	emmake make -j8 -Cbuild_emscripten/wasm_mvp
 	cd build_emscripten/wasm_mvp && bash ../../scripts/duckdb-wasm-build-loadable.sh