diff --git a/run b/run
index d9acf87..9e06290 100755
--- a/run
+++ b/run
@@ -213,7 +213,7 @@ step07() {
     patch -p1 <"$HERE/0.10.0-961-g54160e7f6a-CMakeLists.txt-remove-stage3.patch"
     cp ../zig-$STEP06_/stage1/zig1.wasm stage1/zig1.wasm
 
-    # same as "fullbuild", except the make target does not have "install"
+    # same as "fullbuild", but for zig2 only
     rm -fr build
     mkdir build
     {
@@ -348,6 +348,54 @@ step13() {
   }
 }
 
+# commit 321ccbdc525ab0f5862e42378b962c10ec54e4a1
+# Author: Andrew Kelley <andrew@ziglang.org>
+# Date:   2023-02-18T04:54:26+02:00
+#
+#     Sema: implement for_len
+#
+STEP14=321ccbdc525ab0f5862e42378b962c10ec54e4a1
+STEP14_=0.10.0-1657-g321ccbdc52
+step14() {
+  rm -fr "../zig-$STEP14_"
+  git archive --prefix=zig-$STEP14_/ $STEP14 | tar -C .. -x
+  {
+    pushd "../zig-$STEP14_"
+    patch -p1 <"$HERE/0.10.0-1657-g321ccbdc52-CMakeLists.txt-remove-stage3.patch"
+    cp ../zig-$STEP13_/stage1/zig1.wasm stage1/zig1.wasm
+
+    # same as "fullbuild", but for zig2 only
+    rm -fr build
+    mkdir build
+    {
+      pushd build
+      CC=clang-15 CXX=clang++-15 cmake ..
+      make -j"$(nproc)"
+      popd
+    }
+    popd
+  }
+}
+
+# commit 0bb178bbb2451238a326c6e916ecf38fbc34cab1
+# Merge: 346ec15c50 5fc6bbe71e
+# Author: Andrew Kelley <andrew@ziglang.org>
+# Date:   2023-02-19T17:10:59+02:00
+#
+#     Merge pull request #14671 from ziglang/multi-object-for
+#
+STEP15=0bb178bbb2451238a326c6e916ecf38fbc34cab1
+STEP15_=0.10.0-1681-g0bb178bbb2
+step15() {
+  rm -fr "../zig-$STEP15_"
+  git archive --prefix=zig-$STEP15_/ $STEP15 | tar -C .. -x
+  {
+    pushd "../zig-$STEP15_"
+    ../zig-$STEP14_/build/zig2 build --zig-lib-dir lib update-zig1
+    popd
+  }
+}
+
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   set -xeuo pipefail
   step=${1:-step00}
@@ -368,4 +416,6 @@ if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   if [[ "$step" -le 11 ]]; then step11; fi
   if [[ "$step" -le 12 ]]; then step12; fi
   if [[ "$step" -le 13 ]]; then step13; fi
+  if [[ "$step" -le 14 ]]; then step14; fi
+  if [[ "$step" -le 15 ]]; then step15; fi
 fi