$ ./update
[info] Initialising xubuntu-* package lists update...
[amd64] Downloading available package lists...
Downloading http://archive.ubuntu.com/ubuntu/dists/lunar/main/binary-amd64/Packages.xz file ...
Decompressing http://archive.ubuntu.com/ubuntu/dists/lunar/main/binary-amd64/Packages.xz file ...
Downloading http://ports.ubuntu.com/ubuntu-ports/dists/lunar/main/source/Sources.xz file ...
Decompressing http://ports.ubuntu.com/ubuntu-ports/dists/lunar/main/source/Sources.xz file ...
Downloading http://archive.ubuntu.com/ubuntu/dists/lunar/main/debian-installer/binary-amd64/Packages.xz file ...
Decompressing http://archive.ubuntu.com/ubuntu/dists/lunar/main/debian-installer/binary-amd64/Packages.xz file ...
Downloading http://archive.ubuntu.com/ubuntu/dists/lunar/restricted/binary-amd64/Packages.xz file ...
Decompressing http://archive.ubuntu.com/ubuntu/dists/lunar/restricted/binary-amd64/Packages.xz file ...
Downloading http://ports.ubuntu.com/ubuntu-ports/dists/lunar/restricted/source/Sources.xz file ...
Decompressing http://ports.ubuntu.com/ubuntu-ports/dists/lunar/restricted/source/Sources.xz file ...
Downloading http://archive.ubuntu.com/ubuntu/dists/lunar/restricted/debian-installer/binary-amd64/Packages.xz file ...
Decompressing http://archive.ubuntu.com/ubuntu/dists/lunar/restricted/debian-installer/binary-amd64/Packages.xz file ...
Downloading http://archive.ubuntu.com/ubuntu/dists/lunar/universe/binary-amd64/Packages.xz file ...
Decompressing http://archive.ubuntu.com/ubuntu/dists/lunar/universe/binary-amd64/Packages.xz file ...
Downloading http://ports.ubuntu.com/ubuntu-ports/dists/lunar/universe/source/Sources.xz file ...
Decompressing http://ports.ubuntu.com/ubuntu-ports/dists/lunar/universe/source/Sources.xz file ...
Downloading http://archive.ubuntu.com/ubuntu/dists/lunar/universe/debian-installer/binary-amd64/Packages.xz file ...
Decompressing http://archive.ubuntu.com/ubuntu/dists/lunar/universe/debian-installer/binary-amd64/Packages.xz file ...
[amd64] Loading seed lists...
* Cloning branch lunar of git+ssh://git.launchpad.net/~xubuntu-dev/ubuntu-seeds/+git/xubuntu/
Cloning into '/tmp/germinate-3vvotuj3/xubuntu.lunar'...
remote: Enumerating objects: 6348, done.
remote: Counting objects: 100% (6348/6348), done.
remote: Compressing objects: 100% (3034/3034), done.
remote: Total 6348 (delta 3592), reused 5975 (delta 3310)
Receiving objects: 100% (6348/6348), 4.48 MiB | 467.00 KiB/s, done.
Resolving deltas: 100% (3592/3592), done.
* Cloning branch lunar of git+ssh://git.launchpad.net/~xubuntu-dev/ubuntu-seeds/+git/platform/
Cloning into '/tmp/germinate-3vvotuj3/platform.lunar'...
fatal: remote error: Repository '~xubuntu-dev/ubuntu-seeds/+git/platform' not found.
* Cloning branch lunar of git+ssh://git.launchpad.net/~ubuntu-core-dev/ubuntu-seeds/+git/platform/
Cloning into '/tmp/germinate-3vvotuj3/platform.lunar'...
remote: Enumerating objects: 8774, done.
remote: Counting objects: 100% (8774/8774), done.
remote: Compressing objects: 100% (4376/4376), done.
remote: Total 8774 (delta 5404), reused 7433 (delta 4381)
Receiving objects: 100% (8774/8774), 4.29 MiB | 470.00 KiB/s, done.
Resolving deltas: 100% (5404/5404), done.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/germinate/tsort.py", line 156, in iter_topo_order
    parents = self._graph.pop(next_node_name)
KeyError: 'standard'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/germinate-update-metapackage", line 34, in <module>
    main(sys.argv)
  File "/usr/lib/python3/dist-packages/germinate/scripts/germinate_update_metapackage.py", line 279, in main
    structure = SeedStructure(seed_dist, seed_base, options.vcs)
  File "/usr/lib/python3/dist-packages/germinate/seeds.py", line 469, in __init__
    self._expand_inheritance()
  File "/usr/lib/python3/dist-packages/germinate/seeds.py", line 536, in _expand_inheritance
    self._names = topo_sort(self._inherit)
  File "/usr/lib/python3/dist-packages/germinate/tsort.py", line 64, in topo_sort
    return TopoSorter(graph).sorted()
  File "/usr/lib/python3/dist-packages/germinate/tsort.py", line 111, in sorted
    return list(self.iter_topo_order())
  File "/usr/lib/python3/dist-packages/germinate/tsort.py", line 163, in iter_topo_order
    raise GraphCycleError(self._node_name_stack)
germinate.tsort.GraphCycleError: Cycle in graph ['supported', 'supported-desktop-extra', 'supported-common', 'supported-desktop', 'supported-kernel-desktop', 'standard', 'minimal', 'desktop-common']