--- mbuffer-20200929/Makefile.in.orig	2020-11-08 07:47:44.512670020 +0000
+++ mbuffer-20200929/Makefile.in	2020-11-08 07:48:33.032115323 +0000
@@ -101,7 +101,7 @@
 		test.tar test.md5 mbuffer.md5 idev.so tapetest.so have-af
 
 test.tar:
-	$(TAR) cf test.tar --ignore-failed-read $(TESTTREE)
+	truncate -s 10M test.tar
 
 test.md5: test.tar
 	openssl md5 < test.tar > test.md5