diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7982c1421e..9be651fc30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Sandbox: pass configured `sandbox.docker.env` variables to sandbox containers at `docker create` time. (#15138) Thanks @stevebot-alive.
 - Onboarding/CLI: restore terminal state without resuming paused `stdin`, so onboarding exits cleanly after choosing Web UI and the installer returns instead of appearing stuck.
 - macOS Voice Wake: fix a crash in trigger trimming for CJK/Unicode transcripts by matching and slicing on original-string ranges instead of transformed-string indices. (#11052) Thanks @Flash-LHR.
 - Heartbeat: prevent scheduler silent-death races during runner reloads, preserve retry cooldown backoff under wake bursts, and prioritize user/action wake causes over interval/retry reasons when coalescing. (#15108) Thanks @joeykrug.
diff --git a/src/agents/sandbox-create-args.test.ts b/src/agents/sandbox-create-args.test.ts
index 0bc8de62fc..5200572c86 100644
--- a/src/agents/sandbox-create-args.test.ts
+++ b/src/agents/sandbox-create-args.test.ts
@@ -78,6 +78,7 @@ describe("buildSandboxCreateArgs", () => {
         "1.5",
       ]),
     );
+    expect(args).toEqual(expect.arrayContaining(["--env", "LANG=C.UTF-8"]));
 
     const ulimitValues: string[] = [];
     for (let i = 0; i < args.length; i += 1) {
diff --git a/src/agents/sandbox/docker.ts b/src/agents/sandbox/docker.ts
index e66372a44f..9ddec1978c 100644
--- a/src/agents/sandbox/docker.ts
+++ b/src/agents/sandbox/docker.ts
@@ -156,7 +156,9 @@ export function buildSandboxCreateArgs(params: {
     args.push("--user", params.cfg.user);
   }
   for (const [key, value] of Object.entries(params.cfg.env ?? {})) {
-    if (!key.trim()) continue;
+    if (!key.trim()) {
+      continue;
+    }
     args.push("--env", key + "=" + value);
   }
   for (const cap of params.cfg.capDrop) {