copying 4 paths...
copying path '/nix/store/2g139s26shqha9vmp67bk5f0zz6hjwz3-tzdata-2018e' to 'ssh://nix-ssh@siri'...
copying path '/nix/store/kmqiiwrvb04hqnxhpjxl2jkn3md19pp2-iana-etc-20180711' to 'ssh://nix-ssh@siri'...
copying path '/nix/store/v7hg431d55q30gy7hqlpiji3jnvi8gs3-glibc-2.27' to 'ssh://nix-ssh@siri'...
error: cannot add path '/nix/store/kmqiiwrvb04hqnxhpjxl2jkn3md19pp2-iana-etc-20180711' because it lacks a valid signature
error (ignored): writing to file: Broken pipe
error: unexpected end-of-file