XamlColorSchemeGenerator.exe exited with code 3

[Evangelink]

Describe the bug

I just got your last fix and I did a git clean -dfx to ensure that I am on a fresh clean state.
Now I have an error with XamlColorSchemeGenerator.exe.

The issue is that there is a missing \ line 33 in MahApps.Metro.csproj:

<Exec Command="&quot;$(NuGetPackageRoot)xamlcolorschemegenerator\$(XamlColorSchemeGeneratorVersion)\tools\XamlColorSchemeGenerator.exe&quot; &quot;$(MSBuildProjectDirectory)\Styles\Themes\GeneratorParameters.json&quot;" />

should be

<Exec Command="&quot;$(NuGetPackageRoot)\xamlcolorschemegenerator\$(XamlColorSchemeGeneratorVersion)\tools\XamlColorSchemeGenerator.exe&quot; &quot;$(MSBuildProjectDirectory)\Styles\Themes\GeneratorParameters.json&quot;" />

As the code is working on your machine, I assume that the errors comes from the missing trailing \ on my nuget environment variable.

I can still create a PR for it if you think that's worth being belt and braces here.