nixos-rebuild systemd-boot-builder failure

$ nixos-rebuild switch
building Nix...
building the system configuration...
unpacking 'https://github.com/domenkozar/hie-nix/archive/96af698f0cfefdb4c3375fc199374856b88978dc.tar.gz'...
building '/nix/store/9rb1ahsfz79kcb4a49dsn41bc2gxiy34-083220867c71443b0473374e8abe871cecb8b7d9.tar.gz.drv'...
building '/nix/store/m7lvp0rfmiwwzfkim1rrggc4gjbq9x04-083220867c71443b0473374e8abe871cecb8b7d9.tar.gz-unpacked.drv'...
Traceback (most recent call last):
  File "/nix/store/0wjmhzqfgv1asikb2aahg54qs4vhblw7-systemd-boot-builder.py", line 240, in <module>
    main()
  File "/nix/store/0wjmhzqfgv1asikb2aahg54qs4vhblw7-systemd-boot-builder.py", line 207, in main
    remove_old_entries(gens)
  File "/nix/store/0wjmhzqfgv1asikb2aahg54qs4vhblw7-systemd-boot-builder.py", line 145, in remove_old_entries
    known_paths.append(copy_from_profile(*gen, "kernel", True))
  File "/nix/store/0wjmhzqfgv1asikb2aahg54qs4vhblw7-systemd-boot-builder.py", line 62, in copy_from_profile
    store_file_path = profile_path(profile, generation, name)
  File "/nix/store/0wjmhzqfgv1asikb2aahg54qs4vhblw7-systemd-boot-builder.py", line 59, in profile_path
    return os.readlink("%s/%s" % (system_dir(profile, generation), name))
FileNotFoundError: [Errno 2] No such file or directory: '/nix/var/nix/profiles/system-174-link/kernel'
warning: error(s) occurred while switching to the new configuration