diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3f1d8fa1..a98fd34c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -49,3 +49,4 @@ jobs:
           args: release --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TQ_BUILD_PROFILE: ""
diff --git a/docs/design/deployment.ja.md b/docs/design/deployment.ja.md
index f025f0a1..c63c1bc3 100644
--- a/docs/design/deployment.ja.md
+++ b/docs/design/deployment.ja.md
@@ -13,6 +13,10 @@ Tasq は version tag の push を起点にリリース成果物をデプロイ
 5. workflow が Web frontend を build し、Go tests を実行し、その後 GoReleaser を実行します。
 6. GoReleaser が `tq` と管理対象サービスの実行ファイルを build して archives にまとめ、checksums を作成し、GitHub Release を作成または更新します。
 
+Release artifact では空の `TQ_BUILD_PROFILE` を使用します。GoReleaser は
+template から参照する環境変数について、意図する値が空の場合でも変数自体が
+存在することを要求するため、workflow で明示的に定義します。
+
 ## Prerelease
 
 Prerelease は、正式な安定版 release として扱わない検証用 build に使います。
diff --git a/docs/design/deployment.md b/docs/design/deployment.md
index 6336a23f..cb04c5c1 100644
--- a/docs/design/deployment.md
+++ b/docs/design/deployment.md
@@ -13,6 +13,10 @@ Tasq deploys release artifacts by pushing version tags. The local operator creat
 5. The workflow builds the Web frontend, runs Go tests, and then runs GoReleaser.
 6. GoReleaser builds `tq` plus the managed service executables, packages them into archives, checksums them, and creates or updates the GitHub Release.
 
+Release artifacts use an empty `TQ_BUILD_PROFILE`. The workflow defines the
+variable explicitly because GoReleaser requires every environment variable
+referenced by its templates to exist, even when the intended value is empty.
+
 ## Prerelease
 
 Use prereleases for validation builds that should not be treated as formal stable releases.