UNSIGNED STAGING. This is not the Keel Linux APT archive. The tree under this directory was published while the project had no signing subkey, so its Release file carries no signature and apt refuses it unless a source line says [trusted=yes]. It must never be configured on an appliance, in an appliance build or in any example. The signed archive appears at the root of https://archive.keellinux.org when the signing subkey rotation of decision 0005 is done, and this directory is removed then.