Edit your .csproj file and replace:
<PackageReference Include="nkast.Xna.Framework" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Content" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Graphics" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Audio" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Media" Version="3.11.9002" />
<PackageReference Include="MonoGame.Framework.{Platform}.9000" Version="3.11.9002" />
to:
<PackageReference Include="nkast.Xna.Framework" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Content" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Graphics" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Audio" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Media" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Input" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Game" Version="3.12.9001" />
<PackageReference Include="MonoGame.Framework.{Platform}.9000" Version="3.12.9001" />
For libraries, edit your .csproj file and replace:
<PackageReference Include="nkast.Xna.Framework" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Content" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Graphics" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Audio" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Media" Version="3.11.9002" />
<PackageReference Include="nkast.Xna.Framework.Ref" Version="3.11.9002" PrivateAssets="All" />
to:
<PackageReference Include="nkast.Xna.Framework" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Content" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Graphics" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Audio" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Media" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Input" Version="3.12.9001" />
<PackageReference Include="nkast.Xna.Framework.Game" Version="3.12.9001" />
Edit your .csproj file and replace:
<ItemGroup>
<PackageReference Include="nkast.Xna.Framework.Content.Pipeline.Builder" Version="3.11.9002" />
</ItemGroup>
to:
<ItemGroup>
<PackageReference Include="nkast.Xna.Framework.Content.Pipeline.Builder" Version="3.12.9001" />
</ItemGroup>
if your importers require Windows libraries (WinForms,WPF), use the 'nkast.Xna.Framework.Content.Pipeline.Builder.Windows' package.