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-rw-r--r--unit-tests/envfirst.mk4
1 files changed, 3 insertions, 1 deletions
diff --git a/unit-tests/envfirst.mk b/unit-tests/envfirst.mk
index fedcc0a75056..b5cfc4f5c578 100644
--- a/unit-tests/envfirst.mk
+++ b/unit-tests/envfirst.mk
@@ -1,7 +1,9 @@
-# $NetBSD: envfirst.mk,v 1.3 2020/10/24 08:46:08 rillig Exp $
+# $NetBSD: envfirst.mk,v 1.4 2020/11/09 20:50:56 rillig Exp $
#
# The -e option makes environment variables stronger than global variables.
+.MAKEFLAGS: -e
+
.if ${FROM_ENV} != value-from-env
. error ${FROM_ENV}
.endif