libssl-dev eon't install

[dkryder]

I need to install libssl-dev, but when I try I am getting the following error:

The following packages have unmet dependencies:
libssl-dev : Depends: libssl1.0.0 (= 1.0.1t-1+deb8u6) but 1.0.2l-1~bpo8+1 is to
be installed

/etc/debian_version says 8.9 and i installed the pine64-image-debianmate-310102bps-2.img 

uname -a gives the following output:
Linux dev-fs 3.10.102-2-pine64-longsleep #66 SMP PREEMPT Sat Jul 16 10:53:13 CES
T 2016 aarch64 GNU/Linux


How do I fix this?

Thanks for your time.

William.

unless you need to run a build over a year old you should start over with a newer build