diff --git a/.github/workflows/archiver.sh b/.github/workflows/archiver.sh
index af2908681a..2fe85e849d 100755
--- a/.github/workflows/archiver.sh
+++ b/.github/workflows/archiver.sh
@@ -9,20 +9,30 @@
 echo "Executing $0 $*"
 topdir=$(cd $(dirname $0)/../..; pwd)
 
+# Check that all git submodules have been updated
+cd ${topdir}/epochX/cudacpp/CODEGEN/PLUGIN/CUDACPP_SA_OUTPUT
+if ! git submodule status | grep '^ ' > /dev/null; then
+  echo "ERROR! There are git submodules that need to be updated"
+  git submodule status
+  exit 1
+fi
+
 # Create a temporary directory and a VERSION.txt file
 tmpdir=$(mktemp -d)
 outdir=${tmpdir}/CUDACPP_OUTPUT
 mkdir ${outdir}
-cd ${topdir}/epochX/cudacpp/CODEGEN/PLUGIN/CUDACPP_SA_OUTPUT
 outfile=${outdir}/VERSION.txt
 touch ${outfile}
 dateformat='%Y-%m-%d_%H:%M:%S UTC'
+echo "(From CUDACPP_OUTPUT/__init__.py)" >> ${outfile}
 echo "cudacpp_version              = $(cat __init__.py | awk '/__version__/{print $3}' | sed 's/(//' | sed 's/)//' | sed 's/,/./g')" >> ${outfile}
-echo "mg5_version_current          = $(cat ../../../../../MG5aMC/mg5amcnlo/VERSION | awk '/version =/{print $3}' | sed -r 's/[^0-9.]//g')" >> ${outfile}
-echo "" >> ${outfile}
 echo "mg5_version_minimal          = $(cat __init__.py | awk '/minimal_mg5amcnlo_version/{print $3}'  | sed 's/(//' | sed 's/)//' | sed 's/,/./g')" >> ${outfile}
 echo "mg5_version_latest_validated = $(cat __init__.py | awk '/latest_validated_version/{print $3}'  | sed 's/(//' | sed 's/)//' | sed 's/,/./g')" >> ${outfile}
 echo "" >> ${outfile}
+echo "(From MG5AMC/mg5amcnlo)" >> ${outfile}
+echo "mg5_version_current          = $(cat ../../../../../MG5aMC/mg5amcnlo/VERSION | awk '/version =/{print $3}' | sed -r 's/[^0-9.]//g')" >> ${outfile}
+echo "mg5_commit_current           = $(git submodule status | awk '/ MG5aMC\/mg5amcnlo /{print substr($1,0,9)}')" >> ${outfile}
+echo "" >> ${outfile}
 echo "TARBALL DATE:  $(date -u +"${dateformat}")" >> ${outfile}
 echo "" >> ${outfile}
 TZ=UTC git --no-pager log -n1 --date=format-local:"${dateformat}" --pretty=format:'commit         %h%nAuthor:        %an%nAuthorDate:    %ad%nCommitter:     %cn%nCommitterDate: %cd%nMessage:       "%s"%n' >> ${outfile}