diff --git a/run b/run
index 04c0292..e6887aa 100755
--- a/run
+++ b/run
@@ -283,11 +283,29 @@ step08() {
 # Date:   2022-12-09T02:50:08+02:00
 #
 #     cbe: first set of changes for msvc compatibility
+STEP09=a43fdc1620fa24c8c606f748505766bfd53d1049
+STEP09_=0.10.0-1027-ga43fdc1620
+step09() {
+  local FROM_="$STEP08_"
+  local TO="$STEP09"
+  local TO_="$STEP09_"
+
+  echo "Updating stage3 $FROM_ -> $TO_"
+  rm -fr "../zig-$TO_"
+  git archive --prefix=zig-$TO_/ $TO | tar -C .. -x
+  {
+    pushd "../zig-$TO_"
+    cp ../zig-$FROM_/stage1/zig1.wasm stage1/zig1.wasm
+    fullbuild
+    popd
+  }
+}
 
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   set -xeuo pipefail
   step=${1:-step00}
   step=${step#step}
+  step=${step#0}
 
   # works:
   if [[ "$step" -le 0 ]]; then step00; fi
@@ -299,4 +317,5 @@ if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   if [[ "$step" -le 6 ]]; then step06; fi
   if [[ "$step" -le 7 ]]; then step07; fi
   if [[ "$step" -le 8 ]]; then step08; fi
+  if [[ "$step" -le 9 ]]; then step09; fi
 fi