diff --git a/master.cfg b/master.cfg
index 91d5c1e..e2b5bd8 100644
--- a/master.cfg
+++ b/master.cfg
@@ -29,7 +29,7 @@ assert CLIENT_SECRET
 
 c["workers"] = [
     worker.Worker("worker-rust-1-65", "pass", properties={"rust_version": "1.65"}),
-    worker.Worker("worker-rust-1-71", "pass", properties={"rust_version": "1.71"}),
+    # worker.Worker("worker-rust-1-71", "pass", properties={"rust_version": "1.71"}),
 ]
 rust_workers = ["worker-rust-1-65"]
 
diff --git a/simple/docker-compose.yml b/simple/docker-compose.yml
index 6c24c40..b13afd3 100644
--- a/simple/docker-compose.yml
+++ b/simple/docker-compose.yml
@@ -45,7 +45,10 @@ services:
 
   rust-worker-1-65:
     image: "buildbot-worker-parrrate-rust"
-    build: ../worker
+    build:
+      context: ../worker
+      args:
+        - RUST_VERSION_ARG=1.65
     environment:
       BUILDMASTER: buildbot
       BUILDMASTER_PORT: 9989
@@ -55,20 +58,20 @@ services:
     networks:
       - buildbot-worker
 
-  rust-worker-1-71:
-    image: "buildbot-worker-parrrate-rust"
-    build:
-      context: ../worker
-      args:
-        - RUST_VERSION=1.71
-    environment:
-      BUILDMASTER: buildbot
-      BUILDMASTER_PORT: 9989
-      WORKERNAME: worker-rust-1-71
-      WORKERPASS: pass
-      WORKER_ENVIRONMENT_BLACKLIST: DOCKER_BUILDBOT* BUILDBOT_ENV_* BUILDBOT_1* WORKER_ENVIRONMENT_BLACKLIST
-    networks:
-      - buildbot-worker
+  # rust-worker-1-71:
+  #   image: "buildbot-worker-parrrate-rust"
+  #   build:
+  #     context: ../worker
+  #     args:
+  #       - RUST_VERSION_ARG=1.71
+  #   environment:
+  #     BUILDMASTER: buildbot
+  #     BUILDMASTER_PORT: 9989
+  #     WORKERNAME: worker-rust-1-71
+  #     WORKERPASS: pass
+  #     WORKER_ENVIRONMENT_BLACKLIST: DOCKER_BUILDBOT* BUILDBOT_ENV_* BUILDBOT_1* WORKER_ENVIRONMENT_BLACKLIST
+  #   networks:
+  #     - buildbot-worker
 
   nginx:
     container_name: buildbot-nginx
diff --git a/worker/Dockerfile b/worker/Dockerfile
index c8f5037..4eeaa20 100644
--- a/worker/Dockerfile
+++ b/worker/Dockerfile
@@ -1,5 +1,5 @@
-ARG RUST_VERSION=1.65
-FROM rust:${RUST_VERSION}
+ARG RUST_VERSION_ARG=1.65
+FROM rust:${RUST_VERSION_ARG}
 COPY worker-setup.sh worker-setup.sh
 RUN bash worker-setup.sh
 USER buildbot