From a1839c444bd25c9b560f786342a29b70195fa7d9 Mon Sep 17 00:00:00 2001
From: Carl Tashian <carl@smallstep.com>
Date: Mon, 17 Aug 2020 11:00:44 -0700
Subject: [PATCH] Try using `test -f` instead of testing `docker buildx`
 directly

---
 make/docker.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/make/docker.mk b/make/docker.mk
index eb7b1f7c..82c3d961 100644
--- a/make/docker.mk
+++ b/make/docker.mk
@@ -27,7 +27,7 @@ endif
 	# Register buildx builder
 	mkdir -p $$HOME/.docker/cli-plugins
 
-	docker buildx >/dev/null || \
+	test -f $$HOME/.docker/cli-plugins/docker-buildx || \
 		(wget -O $$HOME/.docker/cli-plugins/docker-buildx https://github.com/docker/buildx/releases/download/v0.4.1/buildx-v0.4.1.$(DOCKER_CLIENT_OS)-amd64 && \
 		chmod +x $$HOME/.docker/cli-plugins/docker-buildx)