diff --git a/Makefile b/Makefile
index b6d2439..76e1036 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 SMAIL_VERSION ?= $(shell git describe --tags --always --dirty)
 GIT_HASH ?= $(shell git show -s --format=%H)
 BUILD_TIME ?= $(shell date -u +%Y-%m-%dT%H:%M:%SZ)
-GO_VERSION ?= $(shell go version)
+GO_VERSION ?= $(shell cd backend && go version)
 BUILD_LDFLAGS = -s -w -X 'git.pcux.cn/xuans/Smail/internal/buildinfo.Version=$(SMAIL_VERSION)' -X 'git.pcux.cn/xuans/Smail/internal/buildinfo.GitHash=$(GIT_HASH)' -X 'git.pcux.cn/xuans/Smail/internal/buildinfo.BuildTime=$(BUILD_TIME)' -X 'git.pcux.cn/xuans/Smail/internal/buildinfo.GoVersion=$(GO_VERSION)'
 
 .PHONY: build clean clean_codex_test_artifacts build_fe build_server wechat_push spam_block telegram_push plugin package test test_mysql test_postgres
diff --git a/test/frontend/output-paths.test.mjs b/test/frontend/output-paths.test.mjs
index 4772d89..89c09b5 100644
--- a/test/frontend/output-paths.test.mjs
+++ b/test/frontend/output-paths.test.mjs
@@ -11,6 +11,7 @@ const read = relative => readFile(path.join(root, relative), 'utf8')
 
 test('跨平台构建输出不得越过项目 out 目录', async () => {
   const content = await read('Makefile')
+  assert.match(content, /GO_VERSION \?= \$\(shell cd backend && go version\)/)
   const commands = [...content.matchAll(/cd ([^\s]+) && [^\n]*go build [^\n]* -o ([^\s]+) /g)]
   assert.equal(commands.length, 12)
   for (const [, directory, output] of commands) {