Use internal OS detection

scripts/Common/Software/PowerShell/Manage.ps1

@@ -16,14 +16,10 @@ Start-SoftwareInstaller @PSBoundParameters `
         & $Installer -Action ([InstallerAction]::Configure);
     } `
     -Configurator {
-        param(
-            [hashtable] $Arguments
-        )
-
         [string] $globalDir = $null;
         $indicator = "# Profile Files";
 
-        if ($Arguments.Linux) {
+        if (-not $IsWindows) {
             $globalDir = '"/etc/powershell/conf.d"';
         } else {
             $globalDir = '"$env:ProgramData/PowerShell/conf.d"';