diff --git a/C/Makefile b/C/Makefile
index e5a6cbf..d43d14b 100644
--- a/C/Makefile
+++ b/C/Makefile
@@ -12,7 +12,9 @@ SLIB=$(BUILD_DIR)/$(LIBNAME).a
 
 .PHONY: clean example
 
-all: build static shared
+all: $(LIBNAME)
+
+$(LIBNAME): build static shared
 
 
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