message: guix: Add section headings to guix-build.sh
diff: export LC_ALL=C
  set -e -o pipefail
  +###################
  +## Sanity Checks ##
  +###################
  +
  # GUIX_BUILD_OPTIONS is an environment variable recognized by guix commands that
  # can perform builds. This seems like what we want instead of
  # ADDITIONAL_GUIX_COMMON_FLAGS, but the value of GUIX_BUILD_OPTIONS is actually
  @@ -26,6 +30,10 @@ EOF
  exit 1
  fi
  +#########
  +# Setup #
  +#########
  +
  # Determine the maximum number of jobs to run simultaneously (overridable by
  # environment)
  MAX_JOBS="${MAX_JOBS:-$(nproc)}"
  @@ -49,6 +57,10 @@ time-machine() {
  -- "$@"
  }
  +#########
  +# Build #
  +#########
  +
  # Function to be called when building for host ${1} and the user interrupts the
  # build
  int_trap() {
  