diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index f70ccd8d..0b3a28b3 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -66,3 +66,7 @@ jobs:
         with:
           upload-snapshots: true
           build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'
+
+      - name: Interactive debug
+        if: ${{ always() && runner.os == 'Linux' && runner.debug == '1' && github.run_attempt != '1' }}
+        uses: r-hub/actions/ssh-server@main