MSIX .wapproj service

Thanks you for waiting.

This is the cleaned appxmanifest:

<?xml version="1.0" encoding="utf-8"?>
<Package
    xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
    xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
    xmlns:desktop6="http://schemas.microsoft.com/appx/manifest/desktop/windows10/6"
    xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
    IgnorableNamespaces="uap rescap">

    <Identity Name="Service" Publisher="CN=Company" Version="0.0.0.0"/>

    <Properties>
        <DisplayName>Service</DisplayName>
        <PublisherDisplayName>Company</PublisherDisplayName>
        <Logo>logo.png</Logo>
    </Properties>

    <Dependencies>
        <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0"/>
        <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.14393.0" MaxVersionTested="10.0.14393.0"/>
    </Dependencies>

    <Capabilities>
        <rescap:Capability Name="packagedServices"/>
        <rescap:Capability Name="runFullTrust"/>
    </Capabilities>

    <Applications>
        <Application
            Id="App"
            Executable="SomeApp.exe"
            EntryPoint="Program">

            <uap:VisualElements
                DisplayName="Service"
                Description="Service"
                BackgroundColor="transparent"
                Square150x150Logo="large.png"
                Square44x44Logo="small.png"/>

            <Extensions>
                <desktop6:Extension
                    Category="windows.service"
                    Executable="SomeApp.exe"
                    EntryPoint="Program">

                    <desktop6:Service
                        Name="Service"
                        StartupType="manual"
                        StartAccount="localService"/>
                </desktop6:Extension>
            </Extensions>
        </Application>
    </Applications>
</Package>

Assuming that the mentioned files and publisher exist, this packs as expected.

It gets interesting when the following two attributed are changed:

<Application Executable="SomeApp.exe" [...]
<Extension Executable="SomeApp.exe" [...]

This combination works:

<Application Executable="$targetnametoken$.exe" [...]
<Extension Executable="SomeApp.exe" [...]

While this one returns an error:

<Application Executable="SomeApp.exe" [...]
<Extension Executable="$targetnametoken$.exe" [...]

The returned error is:

The file name "$targetnametoken$.exe" declared for element "*[local-name()='Applications']/*[local-name()='Application']/*[local-name()='Extensions']/*[local-name()='Extension' and not(@Category='windows.backgroundTasks' or @Category='windows.appService')]" doesn't exist in the package.