wine users - Nov 2016 - Confusion about wine and wine64 binaries and WINEPREFIX variable

Hi,
I just build `wine` with

    ./configure --enable-win64
    make depend
    make

following
https://www.winehq.org/docs/wineusr-guide/installing-wine-source
out-of-tree and find `wine` and `wine64` in the source root assuming
they are the 32- and 64-bit binaries. I don't understand why

    env WINEARCH=win32
WINEPREFIX=/home/richter/.PlayOnLinux/wineprefix/UnrealT2004ECE_gog
./wine programs/wineboot

causes

    wine: '/home/richter/.PlayOnLinux/wineprefix/UnrealT2004ECE_gog' is
a 32-bit installation, it cannot support 64-bit applications.

if `wine` is the 32-bit binary.

experienced with wine-1.9.22-72-gf7187ec on Ubuntu 16.10

-Kalle