Sign the dist as the last step before creating the archive. Take care not to modify/regenerate dist meta files or the manifest.

Error: Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer. gpg: Signature made Fri 22 May 2015 05:15:00 PM JST gpg: using RSA key AE3DDA3E089B5069 gpg: Can't check signature: No public key ==> BAD/TAMPERED signature detected! <==