Architecture is decided by which ISO you downloaded.

Suggest checking if you have the multiarch-support package, ie you
could try

apt-get install multiarch-support

dpkg --add-architecture amd64
dpkg --add-architecture i386

apt-get update

apt-get dist-upgrade (essential to add multi-lib support)
 
On Thursday, November 26, 2015 6:08 AM, Joel Roth <joelz@???>
wrote:
 
> Hi Devuaners,
>
> I installed devuan following dev1fanboy's guide and ended up with
> an amd64 kernel and i386 package binaries.
>
> First of all, I'm curious if those choices are explicit in the
> installer.
> (I thought had I asked for amd64.)
>
> My main question is this. Now I want to compile some
> software that requires amd64. I've already added the
> architecture using 'dpkg --add-architecture amd64'
> and then apt-get update.
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