F# Run Powershell Script As Target - powershell

Question

Trying to run a powershell script using F# FAKE but nothing happens... there are no errors, the target loads but nothing actually is run.
// include Fake lib
#r "packages/FAKE/tools/FakeLib.dll"
#r "System.Management.Automation"
open System
open System.IO
open System.Diagnostics
open System.Management.Automation
Target "Powershell" <| fun _ ->
PowerShell.Create()
.AddScript("& 'build-database.ps1'")
.AddParameter("BuildVersion", version)
.AddParameter("Debug", "")
.Invoke()
|> Seq.iter (printfn "%O")
// Dependencies
"Clean"
==> "Powershell"
// start build
RunTargetOrDefault "Powershell"
Am I missing something? Without any error I am not sure what the issue is.
* Updated *
This is the powershell script I am testing with, FAKE does nothing.
New-Item c:\AnEmptyFile.txt -ItemType file

Answer 1

I finally figured out another way to do it that works. In case someone else has the need to call a powershell script from within F# FAKE the following method worked for me.
Target "Powershell" (fun _ ->
let p = new System.Diagnostics.Process();
p.StartInfo.FileName <- "cmd.exe";
p.StartInfo.Arguments <- ("/c powershell -ExecutionPolicy Unrestricted .\\script.ps1)
p.StartInfo.RedirectStandardOutput <- true
p.StartInfo.UseShellExecute <- false
p.Start() |> ignore
printfn "Processing..."
printfn "%A" (p.StandardOutput.ReadToEnd())
printfn "Finished"
)

Answer 2

Its possible to use Shell.Execute and invoke powershell.exe:
Target "ImportDb" (fun _ ->
Shell.Exec("powershell.exe", "-NoProfile -ExecutionPolicy Bypass -File script.ps1") |> ignore)