diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 0201f04..5bfb6d4 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -58,18 +58,24 @@ jobs:
       - name: 构建 jar（maven 容器，复用宿主 m2 缓存）
         run: |
           set -e
-          docker rm -f mavenbuild 2>/dev/null || true
-          docker run -d --name mavenbuild \
+          # 构建容器名必须全局唯一：runner 挂的是宿主 docker.sock，容器名在整个 daemon 上共享
+          # 命名空间。固定名会在多仓/多条 workflow 并发时互相 docker rm -f 掉对方正在构建的
+          # 容器，表现为无编译报错的 exit 137（SIGKILL，2026-10-21 实测复现）。
+          # GITHUB_RUN_ID 实例级唯一，再拼时间戳兜底。
+          BUILD_CONTAINER="mavenbuild-${GITHUB_RUN_ID:-0}-$(date +%s)"
+          echo "BUILD_CONTAINER=${BUILD_CONTAINER}"
+          docker rm -f "$BUILD_CONTAINER" 2>/dev/null || true
+          docker run -d --name "$BUILD_CONTAINER" \
             --network infra-infra-net \
             -v /opt/docker/projman-m2:/root/.m2 \
             -w /build maven:3.6.3-jdk-8 sleep 3600
-          docker cp "${PWD}/." mavenbuild:/build/
-          docker exec mavenbuild sh -c "printf '%s' '<settings><profiles><profile><id>nexus-repo</id><repositories><repository><id>nexus-internal</id><url>http://nexus:8081/repository/maven-public/</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots></repository></repositories></profile></profiles><activeProfiles><activeProfile>nexus-repo</activeProfile></activeProfiles></settings>' > /root/.m2/settings.xml"
-          docker exec mavenbuild sh -c 'cd /build && mvn -B -DskipTests clean package'
-          docker exec mavenbuild sh -c 'cd /build/target && cp *.jar app.jar'
+          docker cp "${PWD}/." "$BUILD_CONTAINER":/build/
+          docker exec "$BUILD_CONTAINER" sh -c "printf '%s' '<settings><profiles><profile><id>nexus-repo</id><repositories><repository><id>nexus-internal</id><url>http://nexus:8081/repository/maven-public/</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots></repository></repositories></profile></profiles><activeProfiles><activeProfile>nexus-repo</activeProfile></activeProfiles></settings>' > /root/.m2/settings.xml"
+          docker exec "$BUILD_CONTAINER" sh -c 'cd /build && mvn -B -DskipTests clean package'
+          docker exec "$BUILD_CONTAINER" sh -c 'cd /build/target && cp *.jar app.jar'
           mkdir -p "${PWD}/target"
-          docker cp mavenbuild:/build/target/app.jar "${PWD}/target/app.jar"
-          docker rm -f mavenbuild
+          docker cp "$BUILD_CONTAINER":/build/target/app.jar "${PWD}/target/app.jar"
+          docker rm -f "$BUILD_CONTAINER"
 
       - name: 构建并推送镜像
         run: |