... actually an another bug delivered the workaround:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888020
So this may be not a duplicate, as primus wasn't installed on my system
before (and the above bug is about the primus package).
To document (conflicting packages with bumblebee-nvidia?):
> Start-Date: 2018-07-25 17:11:11
> Commandline: apt install nvidia-driver-libs-nonglvnd
> Requested-By: user (1000)
> Install: libgles-nvidia1:amd64 (390.67-3, automatic), libgles-nvidia1:i386
> (390.67-3, automatic), nvidia-nonglvnd-vulkan-icd:amd64 (390.67-3,
> automatic), nvidia-nonglvnd-vulkan-icd:i386 (390.67-3, automatic),
> nvidia-driver-libs-nonglvnd-i386:i386 (390.67-3, automatic),
> libgl1-nvidia-glx:amd64 (390.67-3, automatic), libgl1-nvidia-glx:i386
> (390.67-3, automatic), nvidia-driver-libs-nonglvnd:amd64 (390.67-3),
> nvidia-driver-libs-nonglvnd:i386 (390.67-3, automatic), libegl1-nvidia:amd64
> (390.67-3, automatic), libegl1-nvidia:i386 (390.67-3, automatic),
> nvidia-nonglvnd-vulkan-common:amd64 (390.67-3, automatic)
> Remove: nvidia-vulkan-icd:amd64 (390.67-3), nvidia-vulkan-icd:i386
> (390.67-3), nvidia-driver-libs-i386:i386 (390.67-3),
> nvidia-vulkan-common:amd64 (390.67-3), libgl1-nvidia-glvnd-glx:amd64
> (390.67-3), libgl1-nvidia-glvnd-glx:i386 (390.67-3), nvidia-driver-libs:amd64
> (390.67-3), nvidia-driver-libs:i386 (390.67-3)
> End-Date: 2018-07-25 17:11:29
>
> Start-Date: 2018-07-25 17:18:18
> Commandline: apt install primus
> Requested-By: user (1000)
> Install: primus-libs:amd64 (0~20150328-6, automatic), primus-libs:i386
> (0~20150328-6, automatic), primus:amd64 (0~20150328-6), primus-libs-ia32:i386
> (0~20150328-6, automatic), libgl1-mesa-glx:i386 (18.1.4-1, automatic),
> socat:amd64 (1.7.3.2-2, automatic)
> End-Date: 2018-07-25 17:18:21
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