diff --git a/fuzzers/007-timing/bel/Makefile b/fuzzers/007-timing/bel/Makefile
index 2b248e33..b0cf9ff7 100644
--- a/fuzzers/007-timing/bel/Makefile
+++ b/fuzzers/007-timing/bel/Makefile
@@ -1,4 +1,4 @@
-all: build/sdf
+all: build/sdf.ok
 
 clean:
 	rm -rf build
@@ -17,7 +17,7 @@ build/fixup_timings: build/bel_timings.txt
 build/bel_timings.json: build/fixup_timings
 	python3 tim2json.py --timings=build/bel_timings.txt --json=build/bel_timings.json --properties=build/bel_properties.txt --propertiesmap=properties_map.json --pinaliasmap=pin_alias_map.json --belpins=build/bel_pins.txt --sitepins=build/tile_pins.txt --debug true
 
-build/sdf: build/bel_timings.json
+build/sdf.ok: build/bel_timings.json
 	python3 ${XRAY_UTILS_DIR}/makesdf.py --json=${PWD}/build/bel_timings.json --sdf=${PWD}/build
 	touch build/sdf.ok