Fixes a regression introduced in b129026e2e242e9068158ae6e6fcd8d7c5ea092e. * guix/store/deduplication.scm (dump-file/deduplicate): Use 'sendfile' only when INPUT' is a file port.
Fixes a regression introduced in b129026e2e242e9068158ae6e6fcd8d7c5ea092e. * guix/store/deduplication.scm (dump-file/deduplicate): Use 'sendfile' only when INPUT' is a file port.