Hi noxx. thanks for your good guide for raspi.
i am liray.
i found some typo and something, so i added here about it.
please carefully, bold string are commands.

first, in step 8
sudo apt-get install build-essential libtool autotools-dev autoconf pkg-config libssl-dev libboost-all-dev needs to be sudo apt-get install build-essential libtool autotools-dev autoconf pkg-config libssl-dev libboost-all-dev libevent-dev
the command is shortage about libevent-dev

in step 12,
_wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz' is wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz'

and sudo make install_ is sudo make install

in step 13,
git clone
https://github.com/phoreproject/Phore
is git clone https://github.com/phoreproject/Phore
then
cd Phore

in process 14,
please do these commands before run ./autogen.sh
chmod +x autogen.sh share/genbuild.sh src/leveldb/build_detect_platform
then ./autogen.sh

in process 15,
configuration option is incorrect.
please enter this.
./configure CXXFLAGS="--param ggc-min-expand=1 --param ggc-min-heapsize=32768" LDFLAGS="-L/usr/local/BerkeleyDB.4.8/lib/" CPPFLAGS="-I/usr/local/BerkeleyDB.4.8/include/"

anyway, thanks for your guide!
if you have some question or error, please join discord and tell me!