diff --git a/Makefile b/Makefile
index 9804a0758b..d79ddfbaf7 100644
--- a/Makefile
+++ b/Makefile
@@ -2720,6 +2720,11 @@ ifdef GIT_INTEROP_MAKE_OPTS
 endif
 ifdef GIT_TEST_INDEX_VERSION
 	@echo GIT_TEST_INDEX_VERSION=\''$(subst ','\'',$(subst ','\'',$(GIT_TEST_INDEX_VERSION)))'\' >>$@+
+endif
+ifdef RUNTIME_PREFIX
+	@echo RUNTIME_PREFIX=\'true\' >>$@+
+else
+	@echo RUNTIME_PREFIX=\'false\' >>$@+
 endif
 	@if cmp $@+ $@ >/dev/null 2>&1; then $(RM) $@+; else mv $@+ $@; fi
 
diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
index 006f7b7813..10b8873097 100755
--- a/t/t0060-path-utils.sh
+++ b/t/t0060-path-utils.sh
@@ -512,6 +512,23 @@ test_expect_success MINGW 'MSYSTEM/PATH is adjusted if necessary' '
 	test_write_lines MSYSTEM=$MSYSTEM mingw64 usr >expect &&
 	test_cmp expect actual
 '
+
+test_lazy_prereq RUNTIME_PREFIX '
+	test true = "$RUNTIME_PREFIX"
+'
+
+test_lazy_prereq CAN_EXEC_IN_PWD '
+	cp "$GIT_EXEC_PATH"/git$X ./ &&
+	./git rev-parse
+'
+
+test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD 'RUNTIME_PREFIX works' '
+	mkdir -p pretend/git pretend/libexec/git-core &&
+	echo "echo HERE" | write_script pretend/libexec/git-core/git-here &&
+	cp "$GIT_EXEC_PATH"/git$X pretend/git/ &&
+	GIT_EXEC_PATH= ./pretend/git/git here >actual &&
+	echo HERE >expect &&
+	test_cmp expect actual
 '
 
 test_done