Thanks for the hints.
I restarted my work from scratch and used the src.rpm from fc24.



From: Dave Johansen <davejohansen@gmail.com>
Sent: Tuesday, March 1, 2016 22:24
To: EPEL Development List
Subject: [EPEL-devel] Re: Please test Darktable 2.0.1 for inclusion in EPEL7
 
On Tue, Mar 1, 2016 at 1:50 PM, Peter Loeffler <peter.loeffler@guruz.at> wrote:
Hi,

it's my first time doing this. So please be patient.

I have built Darktable 2.0.1 for RHEL/CentOS 7.
The repo can be found here: https://copr.fedorainfracloud.org/coprs/ploeffler/darktable2/

The spec-file is very simple but it should do the job.
I included some rpms from fedora and nux-desktop to get it running.

Fedora Rawhide has 2.0, so that would probably be a better place to start from:
http://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/source/SRPMS/d/darktable-2.0.0-2.fc24.src.rpm
 
For now everything is installed to /opt/darktable which is the default.
Not shure if this is ok.

It's ok for a personal/COPR repo, but not for general use in EPEL/Fedora. Using one of the above SRPMs would probably be the better place to start because they'll meet (or at least should meet) the packaging guidelines.