diff --git a/fuzzers/001-part-yaml/.gitignore b/fuzzers/001-part-yaml/.gitignore
index 1c232728..7c40c778 100644
--- a/fuzzers/001-part-yaml/.gitignore
+++ b/fuzzers/001-part-yaml/.gitignore
@@ -1,3 +1,2 @@
-/specimen_*/
-*.yaml
+/build
 /run.ok
diff --git a/fuzzers/001-part-yaml/Makefile b/fuzzers/001-part-yaml/Makefile
index 57b4faff..82cd2563 100644
--- a/fuzzers/001-part-yaml/Makefile
+++ b/fuzzers/001-part-yaml/Makefile
@@ -1,16 +1,18 @@
 N := 1
-SPECIMENS := $(addprefix specimen_,$(shell seq -f '%03.0f' $(N)))
+SPECIMENS := $(addprefix build/specimen_,$(shell seq -f '%03.0f' $(N)))
 
 database: $(SPECIMENS)
-	cp specimen_001/part.yaml ${XRAY_PART}.yaml
+	mkdir -p build
+	cp build/specimen_001/part.yaml build/part.yaml
+	python3 -m utils.xyaml build/part.yaml > build/part.json
 
 $(SPECIMENS): Makefile.specimen
 	mkdir -p $@
-	$(MAKE) -C $@ -f ../Makefile.specimen
+	$(MAKE) -C $@ -f ../../Makefile.specimen
 
 pushdb:
-	cp ${XRAY_PART}.yaml ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)
-	python3 -m utils.xyaml ${XRAY_PART}.yaml > ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)/${XRAY_PART}.json
+	cp build/part.yaml ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)
+	cp build/part.json ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)
 
 run:
 	$(MAKE) clean
@@ -19,6 +21,6 @@ run:
 	touch run.ok
 
 clean:
-	rm -rf specimen_[0-9][0-9][0-9]/ *.yaml run.ok
+	rm -rf build run.ok
 
 .PHONY: database pushdb clean run $(SPECIMENS)
diff --git a/fuzzers/001-part-yaml/Makefile.specimen b/fuzzers/001-part-yaml/Makefile.specimen
index 91ea090f..a0706af8 100644
--- a/fuzzers/001-part-yaml/Makefile.specimen
+++ b/fuzzers/001-part-yaml/Makefile.specimen
@@ -1,5 +1,5 @@
 part.yaml: design.perframecrc.bit
 	${XRAY_TOOLS_DIR}/gen_part_base_yaml $< -f > $@
 
-design.bit design.perframecrc.bit: ../generate.tcl
-	${XRAY_VIVADO} -mode batch -source ../generate.tcl
+design.bit design.perframecrc.bit: ../../generate.tcl
+	${XRAY_VIVADO} -mode batch -source ../../generate.tcl
diff --git a/fuzzers/001-part-yaml/generate.tcl b/fuzzers/001-part-yaml/generate.tcl
index 10c8e02d..9db1ff9e 100644
--- a/fuzzers/001-part-yaml/generate.tcl
+++ b/fuzzers/001-part-yaml/generate.tcl
@@ -1,6 +1,6 @@
 create_project -force -part $::env(XRAY_PART) design design
 
-read_verilog ../top.v
+read_verilog ../../top.v
 synth_design -top top
 
 set_property -dict "PACKAGE_PIN $::env(XRAY_PIN_00) IOSTANDARD LVCMOS33" [get_ports clk]