function Invoke-ChocoInstallPackagesPrivate {
<#
.SYNOPSIS
	Installs a list of Chocolatey packages.
#>
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingInvokeExpression', '', Justification = 'Alkami generates this string manually, no user injection')]
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory = $true)]
        [Alias("PackagesToInstall")]
        [object[]]$packages,

        [Parameter(Mandatory = $false)]
        [Alias("f")]
        [switch]$force,

        [Parameter(Mandatory = $false)]
        [Alias("e")]
        [string]$environment,

        [Parameter(Mandatory = $false)]
        [Alias("migrate", "m")]
        [switch]$runMigrations,

        [Parameter(Mandatory = $false)]
        [Alias("start", "s")]
        [switch]$startService,

        [Parameter(Mandatory = $false)]
        [switch]$forceSameVersion,

        [Parameter(Mandatory = $false)]
        [switch]$ignoreDependencies,

        [Parameter(Mandatory = $false)]
        [switch]$preventDowngrade,

        [Parameter(Mandatory = $false)]
        [switch]$SkipScripts
    )

    $loglead = Get-LogLeadName;

    if (!(Test-IsAdmin)) {
        throw "$loglead : User must be an administrator to run Chocolatey installs."
    }

    if($packages.Count -gt 1) {
        $localPackages = Get-ChocoState -l;
    } else {
        $localPackages = Get-ChocoState -l -packageName $packages[0].Name;
    }

    $numPackages = $packages.count;
    Write-Verbose "$loglead : Now installing $numPackages packages:";

    $success = $true;
    $counter = 0;
    foreach ($package in $packages) {
        $name = $package.Name;
        $version = $package.Version;
        $counter++

        try {
            $chocoParams = Get-ChocolateyParameterString $package -env $environment -start $startService.IsPresent -migrate $runMigrations.IsPresent;
            $localPackage = ($localPackages | Where-Object { $_.Name -eq $name });
            $isInstalled = $null -ne ($localPackage);

            # Upgrade if the package is already installed.
            # set local package version to null if not installed
            if (!$isInstalled ) {
                $commandFlag = "install"
                $localPackageVersion = "0.0.0"
            } else {
                $commandFlag = "upgrade"
                $localPackageVersion = $localpackage.Version
            }
            # Compare two sematic verions
            # -1 if $Version1 < $Version2
            # 0  if $Version1 = $Version2
            # 1  if $Version1 > $Version2

            switch ((Compare-SemVer -version1 $localPackageVersion -version2 $version)) {
                1 {
                    $isSameVersion = $false
                    $isDowngrade = $true
                }
                0 {
                    # The Compare-SemVer function will say that certain pre-versions are the same version, and prevent installs.
                    # This string version comparison hack allows these packages to be considered different versions.
                    $isSameVersion = $localPackageVersion -eq $version
                }
                -1 {
                    $isSameVersion = $false
                    $isDowngrade = $false
                }
                Default {

                }
            }

            $forceSwitch = "";
            $forceInstall = $force.IsPresent -or ($forceSameVersion.IsPresent -and $isSameVersion);
            if ($forceInstall) {
                $forceSwitch = "-f";
            }

            # If we're not forcing a package, and it's the same version, then skip the choco install.
            if((!$forceInstall) -and ($isInstalled) -and ($isSameVersion)) {
                Write-Host "$loglead : Skipping install of $name $version because it is already installed."
                continue;
            }

            # Handle ignore-dependency / allow-downgrade flags
            $ignoreDependenciesFlag = if ($ignoreDependencies.IsPresent -or $isSameVersion -or $isDowngrade) {
                "--ignore-dependencies"
            } else {
                ""
            };

            $downgradeFlag = if ($preventDowngrade.IsPresent) {
                ""
            } elseif ($isDowngrade) {
                "--allow-downgrade"
            } else {
                ""
            };

            #Skips running `chocoInstall.ps1` as part of `choco install/upgrade` process
            #Still adds requested package to /lib
            #Makes choco "think" this package is "installed" without running install script
            $skipInstallScriptFlag = if ($SkipScripts.IsPresent) {
                "--skipscripts"
            } else {
                ""
            }

            if ($isSameVersion -and $forceInstall -and $skipInstallScriptFlag) {
                Write-Host "$loglead : Skipping download to just copy same version with componentized installer."
                continue
            }
            Write-Host "$loglead : Now installing ($counter/$numPackages) '$name $version':";

            $command = "choco $commandFlag $name --version $version -y --no-progress $downgradeFlag $ignoreDependenciesFlag $forceSwitch $skipInstallScriptFlag --params $chocoParams;"
            Write-Host "Command: $command"
            Invoke-Expression $command

            Write-Host "$loglead : Installation of '$name $version $skipInstallScriptFlag' done."
        } catch {
            Write-Error $_ | Format-List -force
            $success = $false;
        }
    }

    if (!($success)) {
        throw "$loglead : Installation of one or more packages failed.";
    }
}