warning: could not read HEAD ref from repo at '/var/lib/buildbot-nix/worktrees/726-60421ef12e6a-c12df4e2', using 'master'
building '/nix/store/fg5szjpy85757p9vf49s56i9brj6krba-effect-state-test-env.drv' on 'ssh-ng://nix@jamie'...
building '/nix/store/fg5szjpy85757p9vf49s56i9brj6krba-effect-state-test-env.drv'...
copying 1 paths...
copying path '/nix/store/psgml5l3421s4jklh2s4bgfrzgbyw6i3-effect-state-test-env' from 'ssh-ng://nix@jamie'...
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
variable $src or $srcs should point to the source
Traceback (most recent call last):
  File "/nix/store/kh0x27n6w0dir0ypw91m77p2zp3a3ydp-buildbot-effects/bin/.buildbot-effects-wrapped", line 9, in <module>
    sys.exit(main())
             ~~~~^^
  File "/nix/store/kh0x27n6w0dir0ypw91m77p2zp3a3ydp-buildbot-effects/lib/python3.13/site-packages/buildbot_effects/cli.py", line 369, in main
    args.func(args)
    ~~~~~~~~~^^^^^^
  File "/nix/store/kh0x27n6w0dir0ypw91m77p2zp3a3ydp-buildbot-effects/lib/python3.13/site-packages/buildbot_effects/cli.py", line 132, in run_command
    run_effects(
    ~~~~~~~~~~~^
        drv_path,
        ^^^^^^^^^
    ...<5 lines>...
        extra_sandbox_paths=options.extra_sandbox_paths,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/nix/store/kh0x27n6w0dir0ypw91m77p2zp3a3ydp-buildbot-effects/lib/python3.13/site-packages/buildbot_effects/__init__.py", line 515, in run_effects
    raise BuildbotEffectsError(msg)
buildbot_effects.BuildbotEffectsError: command failed with exit code 1