Let's attempt to fix the path to the library on GH Actions...

.github/workflows/main.yml

@@ -23,7 +23,13 @@ jobs:
 
     - name: Install tools
       run: dotnet tool install --global vpk
-    
+
+    - name: Build Core.Windows
+      run: dotnet build src/Plpext/Plpext.Core.Windows/Plpext.Core.Windows.csproj --configuration Release --no-restore
+
+    - name: Build UI
+      run: dotnet build src/Plpext/Plpext.UI/Plpext.UI.csproj --configuration Release --no-restore
+
     - name: Dotnet publish
       run: dotnet publish src/Plpext/Plpext.UI/Plpext.UI.csproj -c Release -r win-x64 -o publish
 

src/Plpext/Plpext.UI/Plpext.UI.csproj

@@ -66,10 +66,12 @@
     <None Remove="ViewModels\Mocks\**" />
   </ItemGroup>
 
-<Target Name="CopyOpenALToPublish" AfterTargets="Publish">
-  <Copy SourceFiles="$(MSBuildThisFileDirectory)..\..\Plpext.Core.Windows\bin\x64\Release\net8.0\OpenAL32.dll" 
-        DestinationFolder="$(PublishDir)" />
-  <Message Text="OpenAL32.dll copied to publish directory: $(PublishDir)" Importance="high" />
-</Target>
+<ItemGroup>
+  <Content Include="$(MSBuildThisFileDirectory)..\..\Plpext.Core.Windows\lib\x64\OpenAL32.dll">
+    <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    <CopyToPublishDirectory>Always</CopyToPublishDirectory>
+    <Link>OpenAL32.dll</Link>
+  </Content>
+</ItemGroup>
 
 </Project>