gnupg error on Parabola i686

==> WARNING: Empty SIGEXT var, using default .sig
==> WARNING: It's better to use gpg-agent to sign packages in batches
  -> Signing /home/server/packages/staging/kernels/linux-libre-xen-headers-3.3-1-i686.pkg.tar.xz...

Necesita una frase contraseña para desbloquear la clave secreta
del usuario: "André Silva <andre.paulista@adinet.com.uy>"
clave RSA de 2048 bits, ID 98638719, creada el 2012-02-07

pinentry: error while loading shared libraries: libgtk-x11-2.0.so.0: cannot open shared object file: No such file or directory
gpg-agent[31594]: can't connect to the PIN entry module: End of file
gpg-agent[31594]: command get_passphrase failed: No pinentry
gpg: problema con el agente: No pinentry
gpg: no default secret key: Operation cancelled
gpg: signing failed: Operation cancelled
==> ERROR: Signing failed