diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 9e1f4b144..53e2e3189 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -14,6 +14,7 @@ on:
 jobs:
   build_test_server:
     name: Build learn-ocaml and run tests
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
@@ -29,6 +30,7 @@ jobs:
 
   client_using_other_server:
     name: Build learn-ocaml-client and run quick tests
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -53,6 +55,7 @@ jobs:
 
   build_extra_tests:
     name: Run dockerized tests
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
diff --git a/.github/workflows/deploy-master.yml b/.github/workflows/deploy-master.yml
index a13428266..836fe1572 100644
--- a/.github/workflows/deploy-master.yml
+++ b/.github/workflows/deploy-master.yml
@@ -10,6 +10,7 @@ on:
 jobs:
   push_server:
     name: Push learn-ocaml image to Docker Hub
+    if: ${{ github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
@@ -26,6 +27,7 @@ jobs:
           tags: master
   push_client:
     name: Push learn-ocaml-client image to Docker Hub
+    if: ${{ github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
@@ -43,6 +45,7 @@ jobs:
           tags: master
   push_emacs_client:
     name: Push emacs-learn-ocaml-client image to Docker Hub
+    if: ${{ github.repository == 'ocaml-sf/learn-ocaml' }}
     needs: push_client
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f832d066e..e49dbd97f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,7 +19,7 @@ jobs:
   release-please:
     name: Create Release
     runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    if: ${{ github.event.workflow_run.conclusion == 'success' && github.repository == 'ocaml-sf/learn-ocaml'}}
     outputs:
       release_created: ${{ steps.release.outputs.release_created }}
       upload_url: ${{ steps.release.outputs.upload_url }}
diff --git a/.github/workflows/static-builds.yml b/.github/workflows/static-builds.yml
index 3b39e9d6c..23a417beb 100644
--- a/.github/workflows/static-builds.yml
+++ b/.github/workflows/static-builds.yml
@@ -14,6 +14,7 @@ on:
 jobs:
   static-bin-linux:
     name: Builds static Linux binaries
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -43,6 +44,7 @@ jobs:
           path: ${{ matrix.artifact }}
   static-bin-macos:
     name: Builds static Macos binaries
+    if: ${{ github.event_name != 'schedule' || github.repository == 'ocaml-sf/learn-ocaml' }}
     runs-on: macos-latest
     env:
       OPAMYES: 1