diff --git a/fuzzers/101-bram-config/Makefile b/fuzzers/101-bram-config/Makefile
index 8f20b8bb..d764becb 100644
--- a/fuzzers/101-bram-config/Makefile
+++ b/fuzzers/101-bram-config/Makefile
@@ -1,20 +1,23 @@
 N := 1
-SPECIMENS := $(addprefix specimen_,$(shell seq -f '%03.0f' $(N)))
+SPECIMENS := $(addprefix build/specimen_,$(shell seq -f '%03.0f' $(N)))
 SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))
 
 database: $(SPECIMENS_OK)
-	${XRAY_SEGMATCH} -o seg_bramx.block_ram.segbits $(addsuffix /segdata_bram_[lr].txt,$(SPECIMENS))
+	${XRAY_SEGMATCH} -o build/seg_bramx.block_ram.segbits $(addsuffix /segdata_bram_[lr].txt,$(SPECIMENS))
 
 pushdb:
-	${XRAY_MERGEDB} bram_l.block_ram seg_bramx.block_ram.segbits
-	${XRAY_MERGEDB} bram_r.block_ram seg_bramx.block_ram.segbits
+	${XRAY_MERGEDB} bram_l.block_ram build/seg_bramx.block_ram.segbits
+	${XRAY_MERGEDB} bram_r.block_ram build/seg_bramx.block_ram.segbits
 
-$(SPECIMENS_OK):
+build:
+	mkdir build
+
+$(SPECIMENS_OK): build
 	bash generate.sh $(subst /OK,,$@)
 	touch $@
 
 clean:
-	rm -rf specimen_[0-9][0-9][0-9]/ seg_*.segbits vivado*.log vivado_*.str vivado*.jou design *.bits *.dcp *.bit top.v
+	rm -rf build
 
 .PHONY: database pushdb clean
 
diff --git a/fuzzers/101-bram-config/generate.sh b/fuzzers/101-bram-config/generate.sh
index 955c41b6..abebd98c 100644
--- a/fuzzers/101-bram-config/generate.sh
+++ b/fuzzers/101-bram-config/generate.sh
@@ -2,15 +2,17 @@
 
 set -ex
 
+FUZDIR=$PWD
 source ${XRAY_GENHEADER}
 
-python3 ../top.py >top.v
-vivado -mode batch -source ../generate.tcl
+
+python3 $FUZDIR/top.py >top.v
+vivado -mode batch -source $FUZDIR/generate.tcl
 test -z "$(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
+python3 $FUZDIR/generate.py