diff --git a/.github/workflows/ant-build-pull-request.yaml b/.github/workflows/ant-build-pull-request.yaml
index 3c6dfb0e6..08ad02649 100644
--- a/.github/workflows/ant-build-pull-request.yaml
+++ b/.github/workflows/ant-build-pull-request.yaml
@@ -5,6 +5,7 @@ on: pull_request
 jobs:
   build:
     runs-on: ubuntu-latest
+    if: "github.repository == 'yacy/yacy_search_server'
     steps:
     - uses: actions/checkout@master
     - name: Set up JDK 8
diff --git a/.github/workflows/ant-build-selfhosted.yaml b/.github/workflows/ant-build-selfhosted.yaml
index a48137e3a..e97884679 100644
--- a/.github/workflows/ant-build-selfhosted.yaml
+++ b/.github/workflows/ant-build-selfhosted.yaml
@@ -5,6 +5,7 @@ on: push
 jobs:
   build:
     runs-on: self-hosted
+    if: "github.repository == 'yacy/yacy_search_server'
     steps:
     - uses: actions/checkout@master
     - name: Set up JDK 8