diff --git a/action.yml b/action.yml
index 3cf36bf..46cff51 100644
--- a/action.yml
+++ b/action.yml
@@ -26,7 +26,16 @@ inputs:
 runs:
   using: composite
   steps:
-    - run: ${{ github.action_path }}/scripts/run.sh
+    - env:
+        # Manually setting INPUT_* variables here until
+        # https://github.com/actions/runner/issues/665 is resolved:
+        INPUT_APT_OPTS: ${{ inputs.apt-opts }}
+        INPUT_ARTIFACTS_DIR: ${{ inputs.artifacts-dir }}
+        INPUT_BUILDPACKAGE_OPTS: ${{ inputs.buildpackage-opts }}
+        INPUT_DOCKER_IMAGE: ${{ inputs.docker-image }}
+        INPUT_EXTRA_BUILD_DEPS: ${{ inputs.extra-build-deps }}
+        INPUT_SOURCE_DIR: ${{ inputs.source-dir }}
+      run: ${{ github.action_path }}/scripts/run.sh
       shell: bash
 branding:
   color: red