diff --git a/.drone.yml b/.drone.yml
deleted file mode 100644
index dbf80000..00000000
--- a/.drone.yml
+++ /dev/null
@@ -1,123 +0,0 @@
----
-kind: pipeline
-type: docker
-name: Build Docker Image (s2oj-db)
-
-trigger:
-  branch:
-  - master
-
-steps:
-  - name: tags
-    image: alpine
-    commands:
-      - echo -n "latest, $DRONE_BRANCH, ${DRONE_COMMIT_SHA:0:8}" > .tags
-
-  - name: docker
-    image: plugins/docker
-    settings:
-      registry: git.m.ac
-      repo: git.m.ac/baoshuo/s2oj-db
-      context: db
-      dockerfile: db/Dockerfile
-      username: baoshuo
-      password:
-        from_secret: GITMAC_SECRET
-      cache_from: git.m.ac/baoshuo/s2oj-db:latest
-    when:
-      event: push
-      branch: master
-
----
-kind: pipeline
-type: docker
-name: Build Docker Image (s2oj-judger)
-
-trigger:
-  branch:
-  - master
-
-steps:
-  - name: tags
-    image: alpine
-    commands:
-      - echo -n "latest, $DRONE_BRANCH, ${DRONE_COMMIT_SHA:0:8}" > .tags
-
-  - name: docker
-    image: plugins/docker
-    settings:
-      registry: git.m.ac
-      repo: git.m.ac/baoshuo/s2oj-judger
-      context: judger
-      dockerfile: judger/Dockerfile
-      username: baoshuo
-      password:
-        from_secret: GITMAC_SECRET
-      cache_from: git.m.ac/baoshuo/s2oj-judger:latest
-    when:
-      event: push
-      branch: master
-
----
-kind: pipeline
-type: docker
-name: Build Docker Image (s2oj-remote-judger)
-
-trigger:
-  branch:
-  - master
-
-steps:
-  - name: tags
-    image: alpine
-    commands:
-      - echo -n "latest, $DRONE_BRANCH, ${DRONE_COMMIT_SHA:0:8}" > .tags
-
-  - name: docker
-    image: plugins/docker
-    settings:
-      registry: git.m.ac
-      repo: git.m.ac/baoshuo/s2oj-remote-judger
-      context: remote_judger
-      dockerfile: remote_judger/Dockerfile
-      username: baoshuo
-      password:
-        from_secret: GITMAC_SECRET
-      cache_from: git.m.ac/baoshuo/s2oj-remote-judger:latest
-    when:
-      event: push
-      branch: master
-
----
-kind: pipeline
-type: docker
-name: Build Docker Image (s2oj-web)
-
-trigger:
-  branch:
-  - master
-
-steps:
-  - name: tags
-    image: alpine
-    commands:
-      - echo -n "latest, $DRONE_BRANCH, ${DRONE_COMMIT_SHA:0:7}" > .tags
-
-  - name: version
-    image: alpine
-    commands:
-      - sed -i "s/'s2oj-version' => 'dev'/'s2oj-version' => '${DRONE_COMMIT_SHA:0:7}'/g" web/app/.default-config.php
-
-  - name: docker
-    image: plugins/docker
-    settings:
-      registry: git.m.ac
-      repo: git.m.ac/baoshuo/s2oj-web
-      dockerfile: web/Dockerfile
-      username: baoshuo
-      password:
-        from_secret: GITMAC_SECRET
-      cache_from: git.m.ac/baoshuo/s2oj-web:latest
-    when:
-      event: push
-      branch: master
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 682fe8e6..2c8a253d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ on:
   workflow_dispatch:
 
 env:
-  REGISTRY: ghcr.io
+  REGISTRY: ${{ startsWith(github.server_url, 'https://github.com') && 'ghcr.io' || 'git.m.ac' }}
   IMAGE_BASENAME: ${{ github.repository }}
 
 jobs: