diff --git a/run b/run
index c916b4b..0ca8996 100755
--- a/run
+++ b/run
@@ -777,6 +777,27 @@ step33() {
   }
 }
 
+# commit 7a85ad151daece3d0bba3c8d23081502a0956c95
+# Author: mlugg <mlugg@mlugg.co.uk>
+# Date:   2023-08-19T04:35:00+03:00
+#
+#     cbe: elide block result allocation for 0-bit types
+#
+#     This logic already existed for the void type, but is also necessary for
+#     other 0-bit types. Without it, we try to alloc a local for a 0-bit type
+#     which gets translated to a local of type `void` which C doesn't like.
+STEP34=7a85ad151daece3d0bba3c8d23081502a0956c95
+STEP34_=0.11.0-149-g7a85ad151d
+step34() {
+  rm -fr "../zig-$STEP34_"
+  git archive --prefix=zig-$STEP34_/ $STEP34 | tar -C .. -x
+  {
+    pushd "../zig-$STEP34_"
+    ../zig-$STEP33_/build/zig2 build --zig-lib-dir lib update-zig1
+    popd
+  }
+}
+
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   set -xeuo pipefail
   step=${1:-step00}
@@ -817,4 +838,5 @@ if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   if [[ "$step" -le 31 ]]; then step31; fi
   if [[ "$step" -le 32 ]]; then step32; fi
   if [[ "$step" -le 33 ]]; then step33; fi
+  if [[ "$step" -le 34 ]]; then step34; fi
 fi