anchor.diff:  Target "RunNETFX45Tests" (fun _ ->
     createTestUser
     !! (testDir + "/.NET Framework 4.5/NLog.UnitTests.dll")
  -    |> xUnit (fun p -> { p with OutputDir = testDir + "/.NET Framework 4.5" })
  +    |> xUnit (fun p -> 
  +      {
  +        p with
  +          OutputDir = testDir + "/.NET Framework 4.5"
  +          ToolPath = "./src/packages/xunit.runners.1.9.1/tools/xunit.console.clr4.exe"
  +      })
   )
   
   Target "BuildSL4" (fun _ ->
  
positive.code: 
  let createTestUser =
    ExecProcess (fun p -> p.FileName <- "./tests/CreateTestUsers.cmd") (TimeSpan.FromMinutes 1.) |> ignore
  
  Target "RestoreBuildPackages" (fun _ ->
    !! "./src/**/packages.config"
  
negative.code: Target "RunNETFX40Tests" (fun _ ->
    createTestUser
    !! (testDir + "/.NET Framework 4.0/NLog.UnitTests.dll")
      |> xUnit (fun p -> 
        {
          p with
            OutputDir = testDir + "/.NET Framework 4.0"
            ToolPath = "./src/packages/xunit.runners.1.9.1/tools/xunit.console.clr4.exe"
        })
  )
  
  Target "BuildNETFX45" (fun _ ->
  