diff --git a/fuzzers/012-clbn5ffmux/generate.sh b/fuzzers/012-clbn5ffmux/generate.sh
index 8bfd1d47..50e0e763 100644
--- a/fuzzers/012-clbn5ffmux/generate.sh
+++ b/fuzzers/012-clbn5ffmux/generate.sh
@@ -2,18 +2,5 @@
 
 set -ex
 if [ $(vivado -h |grep Vivado |cut -d\  -f 2) != "v2017.2" ] ; then echo "FIXME: requires Vivado 2017.2. See https://github.com/SymbiFlow/prjxray/issues/14"; exit 1; fi
-
-source ${XRAY_GENHEADER}
-
-#echo '`define SEED 32'"'h$(echo $1 | md5sum | cut -c1-8)" > setseed.vh
-
-python3 ../top.py >top.v
-vivado -mode batch -source ../generate.tcl
-test -z "$(fgrep CRITICAL vivado.log)"
-
-for x in design*.bit; do
-	${XRAY_BITREAD} -F $XRAY_ROI_FRAMES -o ${x}s -z -y $x
-done
-
-python3 ../generate.py
+source ${XRAY_DIR}/utils/top_generate.sh