Installing guix from Git

[Konrad Hinsen]

After initially playing with Guix 0.2, I now want to switch to the bleeding 
edge.
I cloned the Git repository, ran "autoreconf -vi", and then "configure". This
ends with an error message:

  ./configure: line 6575: syntax error near unexpected token `GUILE,'
  ./configure: line 6575: `PKG_CHECK_MODULES(GUILE, guile-2.0 >= 2.0.5)'

This looks like autoconf doesn't know as much as it should about
Guile, but I have no idea what to do about this. Suggestions?

Konrad.