diff --git a/fuzzers/fuzzer.mk b/fuzzers/fuzzer.mk
index b4861b6f..e01d8340 100644
--- a/fuzzers/fuzzer.mk
+++ b/fuzzers/fuzzer.mk
@@ -4,10 +4,8 @@ SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))
 
 all: database
 
-build:
-	mkdir build
-
-$(SPECIMENS_OK): build
+$(SPECIMENS_OK):
+	mkdir -p build
 	bash ${XRAY_DIR}/utils/top_generate.sh $(subst /OK,,$@)
 	touch $@