catalyst-o-snafu_no-seed-cache

pi64 /var/tmp/catalyst # catalyst -v -f  stage1-systemd.spec
12 May 2018 17:54:15 BST: INFO    : Catalyst 3.0.1
12 May 2018 17:54:15 BST: INFO    : extended version info unavailable
12 May 2018 17:54:15 BST: INFO    : Copyright 2003-2018 Gentoo Foundation
12 May 2018 17:54:15 BST: INFO    : Copyright 2008-2012 various authors
12 May 2018 17:54:15 BST: INFO    : Distributed under the GNU General Public License version 2.1
12 May 2018 17:54:15 BST: NOTICE  : Loading configuration file: /etc/catalyst/catalyst.conf
12 May 2018 17:54:15 BST: INFO    : Package cache support enabled.
12 May 2018 17:54:15 BST: INFO    : Kernel cache support enabled.
12 May 2018 17:54:15 BST: INFO    : Snapshot cache support enabled.
12 May 2018 17:54:15 BST: INFO    : Autoresuming support enabled.
12 May 2018 17:54:15 BST: INFO    : Envscript support enabled.
12 May 2018 17:54:15 BST: NOTICE  : conf_values[options] = set(['bindist', 'pkgcache', 'kerncache', 'snapcache', 'autoresume'])
12 May 2018 17:54:15 BST: NOTICE  : Processing spec file: stage1-systemd.spec
Traceback (most recent call last):
  File "/usr/lib/python-exec/python2.7/catalyst", line 37, in <module>
    main(sys.argv[1:])
  File "/usr/lib64/python2.7/site-packages/catalyst/main.py", line 285, in main
    return _main(parser, opts)
  File "/usr/lib64/python2.7/site-packages/catalyst/main.py", line 441, in _main
    if os.uname().sysname in  ["Linux", "linux"]:
AttributeError: 'tuple' object has no attribute 'sysname'