some substep of make porepare failing

[turbomam]

mkdir -p build
python3 src/pick_genomes.py data/ANI build/reference_genomes.csv
mkdir -p data/reference_genomes
sshpass -p PASSWORD scp -T mam@merlot.lbl.gov:"" data/reference_genomes

scp: .: not a regular file
make: *** [Makefile:34: mirror_genomes] Error 1

[turbomam]

completes successfully

# 3. Select best match to unicycler_assembly
build/reference_genomes.csv: src/pick_genomes.py | build 
	python3 $< data/ANI $@

[turbomam]

build/reference_genomes.csv empty