Currently, the installation instructions for building Podman from source say that pkg-config is a prerequisite for building Podman on Ubuntu, but they also suggest that it may be necessary to build crun or runc from source if the version isn't recent enough (which in my case it wasn't) – and the build instructions for crun state that pkgconf needs to be installed to build crun.

At least on Ubuntu 20.04, it's not possible to have both pkgconf and pkg-config installed at the same time. Is pkgconf sufficient for building Podman, or do I have to install pkgconf, build crun, then uninstall pkgconf and install pkg-config before I build Podman?

I also wondered why there was this inconsistency, when both Podman and crun are projects in the containers GitHub organisation – should one or the other be amended so that they're both the same?