I got the problem!

In /etc/xbps.d/xbps.conf I've set

rootdir=/
cachedir=var/cache/xbps

The comment said, relative pathes are handled relative to rootdir. But this 
is only half true: xbps-install creates that directory in the current 
working directory, the file checks later happening in rootdir+cachdir, 
though. So the file cannot be found and the signature check failes.

I now "solved" the problem by setting cachedir to a absolute path. I'm 
filing an issue now.



Am Samstag, 12. September 2015 14:06:44 UTC+2 schrieb kør:
>
> Hi, I manually installed Void following the documentation for installing 
> on an UEFI system with root in encrypted LVM 
> <https://github.com/voidlinux/documentation/wiki/Install-LVM-LUKS-on-UEFI-GPT>. 
> Now after booting the system and syncing the repository data, I cannot 
> install anything. Every attempt failes with
>
> xbps-install: <packet>-<version>: the RSA signature is not valid!
>
> Do I have to sync some keys or so?
>
> In case it is important, this is the output of `xbps-query -vL`:
>
>  4661 http://muslrepo.voidlinux.eu/current (RSA signed)
>       Signed-by: Void Linux
>       4096 3d:b9:c0:50:41:a7:68:4c:2e:2c:a9:a2:5a:04:b7:3f
>
> Thanks alot!
>
>
>
> PS: I posted this already today but didn't find it afterwards. It might be 
> doubled now, sorry for that.
>