hs.fs.volume.eject is not executed at hs.caffeinate.watcher.systemWillSleep event

[mrdc]

Hello,

I'm trying to do some pre-sleep tasks when my MacBook goes to sleep. Especially, unmount several remote volumes, but hs.fs.volume.eject("/Volumes/SomeVolume") is not executed at hs.caffeinate.watcher.systemWillSleep event.
Initially, I've tried this and the unmount wasn't successful:

function caffeinateWatcher(eventType)
    if (eventType == hs.caffeinate.watcher.systemWillSleep) then
            print ("Executing pre-Sleep tasks...")
            -- Execute sleep script
            hs.task.new("/Users/user/.sleep", nil):start():waitUntilExit()
            --hs.task.waitUntilExit()
    elseif (eventType == hs.caffeinate.watcher.systemDidWake) then
            print ("Executing after-Wake tasks...")
            -- Execute wake script
            --hs.task.new("/Users/user/.wakeup", nil):start()

    end
end

sleepWatcher = hs.caffeinate.watcher.new(onSystemSleep)
sleepWatcher:start()

.sleep:

#!/bin/bash
caffeinate -i diskutil unmount "/Volumes/SomeVolume"

# or

diskutil unmount "/Volumes/SomeVolume"

This also failed:

local function ejectVolume(volumeName)
    local ejectTask = hs.task.new("/usr/sbin/diskutil", function(exitCode, stdout, stderr)
        if exitCode == 0 then
            hs.notify.new({
                title = "Volume Ejected",
                informativeText = "Successfully ejected volume: " .. volumeName
            }):send()
        else
            hs.notify.new({
                title = "Eject Failed",
                informativeText = "Failed to eject volume: " .. volumeName .. "\nError: " .. stderr
            }):send()
        end
    end, {"unmount", volumeName})

    ejectTask:start()
end

Using AppleScript also failed:

hs.osascript.applescript([[
        tell application "Finder"
                eject disk SomeVolume
        end tell
    ]])

Is it possible to delay going to sleep and execute all tasks triggered by the systemWillSleep event?

macOS Sonoma 14.7.2
Hammerspoon 1.0.0 (6864)