diff --git a/gwc/parent.make b/gwc/parent.make
index 81fd3eb37..d6a8ca50b 100644
--- a/gwc/parent.make
+++ b/gwc/parent.make
@@ -23,7 +23,7 @@ parent.make:: $(LMI_ENV_FILE)
 
 $(LMI_ENV_FILE):
 	@echo "Sourcing 'set.sh'"; \
-	. ./set.sh ; \
+	./set.sh > $@ ; \
 	echo "'$$LMI_IN' --> '$$LMI_OUT1', '$$LMI_OUT2' : sourced in 'parent.make'"
 
 all:
diff --git a/gwc/set.sh b/gwc/set.sh
index 0660dc91f..b5282f761 100755
--- a/gwc/set.sh
+++ b/gwc/set.sh
@@ -1,13 +1,4 @@
-#!/bin/sh this-script-must-be-sourced-not-run
-
-foo()
-{
-# $LMI_ENV_FILE is defined by the makefile that sources this script.
-# shellcheck disable=SC2154
-echo "LMI_ENV_FILE in 'set.sh': $LMI_ENV_FILE"
-echo "'$LMI_IN' --> '$LMI_OUT1', '$LMI_OUT2' : entering 'set.sh'"
-export LMI_OUT1="$LMI_IN"
-export LMI_OUT2="$LANG"
+#!/bin/sh
 
 case "$LMI_IN" in
     (Mongolia) LMI_OUT2="mn_MN" ;;
@@ -15,15 +6,5 @@ case "$LMI_IN" in
     (*) ;;
 esac
 
-echo "'$LMI_IN' --> '$LMI_OUT1', '$LMI_OUT2' : leaving 'set.sh'"
-if [ -n "$LMI_ENV_FILE" ]; then
-    {
-    echo "export LMI_OUT1 := $LMI_OUT1"
-    echo "export LMI_OUT2 := $LMI_OUT2"
-    } > "$LMI_ENV_FILE"
-fi
-}
-
-foo
-
-unset -f foo
+echo export LMI_OUT1="$LMI_IN"
+echo export LMI_OUT2="$LMI_OUT2"