flatpak-builder from source on Pop!_OS 22.04

main.sh

#! /usr/bin/env bash

# build deps
sudo apt install meson libelf-dev

# get source
git clone git@github.com:flatpak/flatpak-builder.git
cd flatpak-builder

# from repo instructions, build
meson setup _build
# if you get an error about appstream
  /usr/bin/appstreamcli compose --help
  # that should instruct you to
  sudo appstreamcli install org.freedesktop.appstream.compose
# from repo instructions, install
meson install -C _build