Calling specific version of MSBuild within psake script

Question

I am trying to compile the code for my MVC application via MSBuild.exe. I was getting errors before, but thanks to this answer, I know what the issue is.

I was using the wrong version of MSBuild.exe

Now that I know what version I should be using, my psake script won't work, I'm not sure how I can target the MSBuild.exe that sits here

C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin\MSBuild.exe

My psake Compile task now looks like this, but VS is telling me the syntax is wrong on line 7.

task Compile `
    -description "Compile the code" `
    -requiredVariables $solutionFile, $buildConfiguration, $buildPlatform, $tempOutputDirectory `
    -depends Init {
        Write-Host $compileMessage
        Exec {
          "C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin\MSBuild.exe" $solutionFile "/p:Configuration=$buildConfiguration;Platform=$buildPlatform;OutputDir=$tempOutputDirectory"
        }
}

When I had the below, VS 2017 doesn't complain about the syntax, but I get the WebApplication.targets error when running the build script, and that must be because the wrong version of MSBuild is being used.

task Compile `
    -description "Compile the code" `
    -requiredVariables $solutionFile, $buildConfiguration, $buildPlatform, $tempOutputDirectory `
    -depends Init {
        Write-Host $compileMessage
        Exec {
          msbuild $solutionFile "/p:Configuration=$buildConfiguration;Platform=$buildPlatform;OutputDir=$tempOutputDirectory"
        }
}