--- dejagnu-1.6.3/Makefile.in.orig	2021-05-23 06:16:31.000000000 +0000
+++ dejagnu-1.6.3/Makefile.in	2021-06-30 10:41:28.507849542 +0000
@@ -563,7 +563,7 @@
 
 # We override runtest so that the testsuite is run with this version
 # of DejaGnu instead of an installed version.
-RUNTEST = ${top_srcdir}/runtest
+RUNTEST = "$${RUNTEST_SCRIPT:-${top_srcdir}/runtest}"
 AM_CXXFLAGS = -I$(top_srcdir) -g
 unit_SOURCES = testsuite/libdejagnu/unit.cc