sourmash compute --scaled 1 fails

[ctb]

./sourmash compute --scaled 1 data/GCF_000*.gz -f
# running sourmash subcommand: compute
setting num_hashes to 0 because --scaled is set
computing signatures for files: data/GCF_000005845.2_ASM584v2_genomic.fna.gz, data/GCF_000006945.1_ASM694v1_genomic.fna.gz, data/GCF_000783305.1_ASM78330v1_genomic.fna.gz
Computing signature for ksizes: [31]
Computing only DNA (and not protein) signatures.
Computing a total of 1 signatures.
Computing signature for ksizes: [31]
Traceback (most recent call last):
  File "./sourmash", line 5, in <module>
    main()
  File "/Users/t/dev/sourmash/sourmash_lib/__main__.py", line 56, in main
    cmd(sys.argv[2:])
  File "/Users/t/dev/sourmash/sourmash_lib/commands.py", line 269, in compute
    Elist = make_estimators()
  File "/Users/t/dev/sourmash/sourmash_lib/commands.py", line 208, in make_estimators
    seed=seed)
  File "/Users/t/dev/sourmash/sourmash_lib/__init__.py", line 73, in __init__
    seed=seed)
  File "sourmash_lib/_minhash.pyx", line 40, in sourmash_lib._minhash.MinHash.__init__ (sourmash_lib/_minhash.cpp:1481)
    HashIntoType max_hash=0):
OverflowError: Python int too large to convert to C unsigned long