私はDebian Jessie（stable）を実行していてフォローしました。この方法拡張（テスト）から単一のパッケージをインストールします。
ただし、「不足していない依存関係」エラーが発生します。この問題を解決し、このパッケージのベータ版をインストールするにはどうすればよいですか？
$ sudo apt-get -t stretch install libboost-all-dev
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:
gsettings-desktop-schemas : Breaks: gnome-settings-daemon (< 3.19.92) but 3.14.2-3 is to be installed
Breaks: mutter (< 3.19.92) but 3.14.4-1~deb8u1 is to be installed
gstreamer1.0-plugins-base : Breaks: gstreamer1.0-plugins-bad (< 1.7.90) but 1.4.4-2.1+deb8u1 is to be installed
libgstreamer-plugins-base1.0-0 : Breaks: gstreamer1.0-plugins-bad (< 1.7.1) but 1.4.4-2.1+deb8u1 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.