openjdk-8-jre-headless: ca-certificates-javaに依存しますが、インストールしません。

Java8 をインストールできません。

apt-get install openjdk-8-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 openjdk-8-jre-headless : Depends: ca-certificates-java but it is not going to be installed
E: Unable to correct problems, you have held broken packages

Googleを検索し、リポジトリやその他の提案を追加しましたが、まだJava 8をインストールすることはできません。

アイデア？

lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 8.7 (jessie)
Release:        8
Codename:       jessie