diff --git a/.github/workflows/periodic-merge-24h.yml b/.github/workflows/periodic-merge-24h.yml
index 83d95e0b8bff2..1028b64a91765 100644
--- a/.github/workflows/periodic-merge-24h.yml
+++ b/.github/workflows/periodic-merge-24h.yml
@@ -20,6 +20,7 @@ permissions:
 
 jobs:
   periodic-merge:
+    if: github.repository_owner == 'NixOS'
     strategy:
       # don't fail fast, so that all pairs are tried
       fail-fast: false
diff --git a/.github/workflows/periodic-merge-6h.yml b/.github/workflows/periodic-merge-6h.yml
index c540840c0a13f..9d72539dd02ee 100644
--- a/.github/workflows/periodic-merge-6h.yml
+++ b/.github/workflows/periodic-merge-6h.yml
@@ -20,6 +20,7 @@ permissions:
 
 jobs:
   periodic-merge:
+    if: github.repository_owner == 'NixOS'
     strategy:
       # don't fail fast, so that all pairs are tried
       fail-fast: false
diff --git a/.github/workflows/periodic-merge.yml b/.github/workflows/periodic-merge.yml
index cd674fd582d67..e8307308218c1 100644
--- a/.github/workflows/periodic-merge.yml
+++ b/.github/workflows/periodic-merge.yml
@@ -14,7 +14,6 @@ on:
 
 jobs:
   merge:
-    if: github.repository_owner == 'NixOS'
     runs-on: ubuntu-24.04
     name: ${{ inputs.from }} → ${{ inputs.into }}
     steps: