diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 586c815..2378a25 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -24,7 +24,15 @@ jobs:
             CMAKE_EXPORT_COMPILE_COMMANDS=ON
             ENABLE_COVERAGE=ON
           run-build: false
-        
+
+      - name: Get modified source
+        id: get-modified-source
+        uses: actions/github-script@v7
+          with:
+            script: |
+              const diff = require('./diff.js');
+              console.log(diff({github, context}))
+
       - name: Get affected targets
         id: find-targets
         uses: actions/github-script@v7