diff --git a/Makefile b/GNUmakefile
similarity index 100%
rename from Makefile
rename to GNUmakefile
diff --git a/certs/Makefile b/certs/GNUmakefile
similarity index 100%
rename from certs/Makefile
rename to certs/GNUmakefile
diff --git a/util-src/Makefile b/util-src/GNUmakefile
similarity index 94%
rename from util-src/Makefile
rename to util-src/GNUmakefile
index f18d5a80a..4b8540c5b 100644
--- a/util-src/Makefile
+++ b/util-src/GNUmakefile
@@ -18,7 +18,7 @@ endif
 all: $(ALL)
 
 install: $(ALL)
-	$(INSTALL_DATA) $^ $(TARGET)
+	$(INSTALL_DATA) $? $(TARGET)
 
 clean:
 	rm -f $(ALL) $(patsubst %.so,%.o,$(ALL))