When building guix (with commit cb3f9696f6251ad382febad33290fed929c176b4
from branch version-1.3.0) on Debian, it fails with the following error
with guile-library (a.k.a. guile-lib) version 0.2.6.1-2:

  ice-9/eval.scm:293:34: error: %strict-tokenizer?: unbound variable
  hint: Did you forget a `use-modules' form?

  [ 10%] LOAD     guix/import/go.scm
  ;;; Failed to autoload semver-range-contains? in (semver ranges):
  ;;; missing interface for module (semver ranges)
 ...
  ;;; Failed to autoload semver<? in (semver):
  ;;; missing interface for module (semver)
  ice-9/eval.scm:293:34: error: %strict-tokenizer?: unbound variable
  hint: Did you forget a `use-modules' form?


Installing guile-library version 0.2.7 works fine.

FWIW, I do not have guile-semver installed in either case; that seems to
be a truely optional dependency... guile-semver is not yet accepted in
Debian, but hopefully will be soon:

  https://ftp-master.debian.org/new/guile-semver_0.1.1-1.html


Maybe doc/guix.texi should be updated to specify the minimum version?


live well,
  vagrant