Add default.nix
Add default.nix

Signed-off-by: Austin Seipp <48c905ac3851f382b914247d97dd93273d5ff555@pobox.com>

thoughtpolice/hs-nacl,thoughtpolice/hs-nacl,thoughtpolice/hs-nacl,thoughtpolice/hs-nacl,thoughtpolice/hs-nacl