diff --git a/run b/run
index c9748ac..d2713bf 100755
--- a/run
+++ b/run
@@ -73,13 +73,21 @@ CALL_OPTIONS_=0.10.0-747-g7b2a936173
 CALL_USAGES=08b2d491bcd8c79c68495267cc71967661caea1e
 CALL_USAGES_=0.10.0-748-g08b2d491bc
 
+# commit 35184bff75420f405cb703c9cf86b196843b9a94 (HEAD)
+# Author: r00ster91 <r00ster91@proton.me>
+# Date:   2022-12-13T23:30:06+02:00
+# 
+#     std.builtin: rename Type.UnionField and Type.StructField's field_type to type
+BUILTIN_TYPE=aac2d6b56f32134ea32fb3d984e3fcdfddd8aaf6 
+BUILTIN_TYPE_=0.10.0-851-gaac2d6b56f
+
 # commit 2a5e1426aa9469fadb78e837d0100d689213b034
 # Author: Veikka Tuominen <git@vexu.eu>
 # Date:   2022-12-16T19:44:25+02:00
 #
 #     update zig1.wasm to builtin.Type field changes
-BUILTIN_TYPE=2a5e1426aa9469fadb78e837d0100d689213b034
-BUILTIN_TYPE_=0.10.0-853-g2a5e1426aa
+REMOVE_BUILTIN_TYPE=2a5e1426aa9469fadb78e837d0100d689213b034
+REMOVE_BUILTIN_TYPE_=0.10.0-853-g2a5e1426aa
 
 fullbuild() {
   rm -fr build
@@ -209,7 +217,22 @@ step50() {
     pushd "../zig-$TO_"
     cp ../zig-$FROM_/stage1/zig1.wasm stage1/zig1.wasm
     fullbuild
-    build/stage3/bin/zig build update-zig1
+    popd
+  }
+}
+
+step60() {
+  local FROM="$BUILTIN_TYPE"
+  local FROM_="$BUILTIN_TYPE_"
+  local TO="$REMOVE_BUILTIN_TYPE"
+  local TO_="$REMOVE_BUILTIN_TYPE_"
+
+  echo "Updating zig1.wasm from $FROM_ -> $TO_ in ../zig-$TO_"
+  rm -fr "../zig-$TO_"
+  git archive --prefix=zig-$TO_/ $TO | tar -C .. -x
+  {
+    pushd "../zig-$TO_"
+    "../zig-$FROM_/build/stage3/bin/zig" build --zig-lib-dir lib update-zig1
     popd
   }
   echo "zig1.wasm updated for $TO_"
@@ -226,7 +249,6 @@ if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   if [[ "$step" -le 20 ]] ; then step20; fi
   if [[ "$step" -le 30 ]] ; then step30; fi
   if [[ "$step" -le 40 ]] ; then step40; fi
-
-  # does not work:
   if [[ "$step" -le 50 ]] ; then step50; fi
+  if [[ "$step" -le 60 ]] ; then step60; fi
 fi