diff --git a/.github/workflows/build-binaries.yml b/.github/workflows/build-binaries.yml
index 9f9feb887..6c241c56b 100644
--- a/.github/workflows/build-binaries.yml
+++ b/.github/workflows/build-binaries.yml
@@ -7,6 +7,12 @@ name: Build binaries
 jobs:
   build:
     name: Build and deploy
+
+    # The only purpose of this workflow is to upload builds, so do not run it
+    # in contexts when upload is impossible: only the official repository has
+    # the secrets to upload binaries to Bintray.
+    if: github.repository = "AdaCore/libadalang"
+
     strategy:
       fail-fast: false
       matrix: # Build debug and production