'Cannot access included files SourceGenerator

I added this ItemGroup to the SourceGenerator.csproj file

<ItemGroup>
        <Content Include="defs\*\*.json" CopyToOutputDirectory="PreserveNewest" />
        <Content Include="Templates\*.template" CopyToOutputDirectory="PreserveNewest" />
</ItemGroup>

OBS: The files get copied to the output if i build the SourceGenerator project.

I get the path of the template file like this:

var path = Path.Combine(AppContext.BaseDirectory, "Templates", _fileName);

But, while trying to compile the Project that references this SourceCode generator i get an warning:

Generator 'SourceGenerator' failed to generate source. It will not contribute to the output and compilation errors may occur as a result. Exception was of type 'DirectoryNotFoundException' with message 'Could not find a part of the path 'C:\Program Files\dotnet\sdk\6.0.300-preview.22204.3\Roslyn\bincore\Templates\Struct.template'.'


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