diff --git a/action.yml b/action.yml
index 9b37bfb..879f705 100644
--- a/action.yml
+++ b/action.yml
@@ -18,6 +18,9 @@ inputs:
   architecture:
     description: Architecture for which this package is built.  Only relevant for the resulting filename.
     default: all
+  pre_package_hook:
+    description: Shell script to run right before invoking "dpkg-deb --build".
+    default: ""
 runs:
   using: docker
   image: docker://docker.io/library/debian:bookworm
@@ -50,6 +53,7 @@ runs:
       [[ -f ${{ inputs.package_root }}/DEBIAN/prerm ]] && chmod +x ${{ inputs.package_root }}/DEBIAN/prerm
       [[ -f ${{ inputs.package_root }}/DEBIAN/postrm ]] && chmod +x ${{ inputs.package_root }}/DEBIAN/postrm
       sed -re "s/__VERSION__/${VERSION}-1/g" -i ${{ inputs.package_root }}/DEBIAN/control
+      ${{ inputs.pre_package_hook }}
       cd "${{ inputs.package_root }}/.."
       dpkg-deb --build $(basename ${{ inputs.package_root }})
       mv "$(basename ${{ inputs.package_root }}).deb" "${GITHUB_WORKSPACE}/${{ inputs.package_output_path }}/${{ inputs.package_name }}_${VERSION}-1_${{ inputs.architecture }}.deb"