diff --git a/contrib/fuzz/Makefile b/contrib/fuzz/Makefile
--- a/contrib/fuzz/Makefile
+++ b/contrib/fuzz/Makefile
@@ -72,7 +72,7 @@
 
 # TODO use the $OUT env var instead of hardcoding /out
 /out/sanpy/bin/python:
-	cd /Python-2.7.15/ && ./configure --without-pymalloc --prefix=$$OUT/sanpy CFLAGS='-O1 -fno-omit-frame-pointer -g -fwrapv -fstack-protector-strong' LDFLAGS=-lasan  && ASAN_OPTIONS=detect_leaks=0 make && make install
+	cd /Python-2.7.15/ && ./configure --without-pymalloc --prefix=$$OUT/sanpy CFLAGS="$(CFLAGS)" LDFLAGS=$$PYLDFLAGS && ASAN_OPTIONS=detect_leaks=0 make && make install
 
 sanpy: /out/sanpy/bin/python