diff --git a/.github/workflows/buf.yml b/.github/workflows/buf.yml
index b63f073fa..edb7936d7 100644
--- a/.github/workflows/buf.yml
+++ b/.github/workflows/buf.yml
@@ -7,6 +7,7 @@ jobs:
   buf:
     name: lint and publish
     runs-on: ubuntu-latest
+    if: github.repository_owner == 'prometheus'
     steps:
       - uses: actions/checkout@v3
       - uses: bufbuild/buf-setup-action@v1.20.0
diff --git a/.github/workflows/lock.yml b/.github/workflows/lock.yml
index 1725fb4f2..c6ac3d74e 100644
--- a/.github/workflows/lock.yml
+++ b/.github/workflows/lock.yml
@@ -14,6 +14,7 @@ concurrency:
 jobs:
   action:
     runs-on: ubuntu-latest
+    if: github.repository_owner == 'prometheus'
     steps:
       - uses: dessant/lock-threads@v4
         with:
diff --git a/.github/workflows/repo_sync.yml b/.github/workflows/repo_sync.yml
index 37be80d45..9526cd2fe 100644
--- a/.github/workflows/repo_sync.yml
+++ b/.github/workflows/repo_sync.yml
@@ -6,6 +6,7 @@ on:
 jobs:
   repo_sync:
     runs-on: ubuntu-latest
+    if: github.repository_owner == 'prometheus'
     container:
       image: quay.io/prometheus/golang-builder
     steps: