diff --git a/src/Uno.Wasm.Bootstrap/ShellTask.cs b/src/Uno.Wasm.Bootstrap/ShellTask.cs
index ececf6965..c24fdeaad 100644
--- a/src/Uno.Wasm.Bootstrap/ShellTask.cs
+++ b/src/Uno.Wasm.Bootstrap/ShellTask.cs
@@ -79,6 +79,7 @@ public partial class ShellTask_v0 : Task
 		[Required]
 		public string WasmShellMode { get; set; } = "";
 
+		public ITaskItem[] ExistingStaticWebAsset { get; set; } = [];
 
 		public ITaskItem[] EmbeddedResources { get; set; } = [];
 
@@ -145,7 +146,7 @@ public partial class ShellTask_v0 : Task
 
 		public override bool Execute()
 		{
-			IntermediateOutputPath = TryConvertLongPath(IntermediateOutputPath);
+			IntermediateOutputPath = IntermediateOutputPath;
 			_intermediateAssetsPath = Path.Combine(IntermediateOutputPath, "unowwwrootassets");
 			Directory.CreateDirectory(_intermediateAssetsPath);
 
@@ -161,6 +162,7 @@ public override bool Execute()
 				GenerateIndexHtml();
 				GenerateEmbeddedJs();
 				GenerateConfig();
+				RemoveDuplicateAssets();
 			}
 			finally
 			{
@@ -170,6 +172,26 @@ public override bool Execute()
 			return true;
 		}
 
+		private void RemoveDuplicateAssets()
+		{
+			// Remove duplicate assets from the list to be exported.
+			// They might have been imported from the build pass.
+
+			var existingAssets = StaticWebContent
+				.Where(s => ExistingStaticWebAsset.Any(e => e.ItemSpec == s.ItemSpec || e.GetMetadata("FullPath") == s.GetMetadata("FullPath")))
+				.ToArray();
+
+			foreach (var existingAsset in existingAssets)
+			{
+				Log.LogMessage(MessageImportance.Low, $"Existing asset to remove [{existingAsset.ItemSpec}]");
+			}
+
+			// remove existingAssets from StaticWebContent
+			StaticWebContent = StaticWebContent
+				.Where(s => !existingAssets.Contains(s))
+				.ToArray();
+		}
+
 		private void GeneratedAOTProfile()
 		{
 			var useAotProfile = !GenerateAOTProfile && UseAotProfile;
@@ -209,25 +231,31 @@ private void Cleanup()
 
 		private (string fullPath, string relativePath) GetFilePaths(ITaskItem item)
 		{
-			// This is for project-local defined content
-			var baseSourceFile = item.GetMetadata("DefiningProjectDirectory");
+			if (item.GetMetadata("RelativePath") is { } relativePath && !string.IsNullOrEmpty(relativePath))
+			{
+				Log.LogMessage(MessageImportance.Low, $"RelativePath '{relativePath}' for full path '{item.GetMetadata("FullPath")}' (ItemSpec: {item.ItemSpec})");
 
-			if (item.GetMetadata("TargetPath") is { } targetPath && !string.IsNullOrEmpty(targetPath))
+				// This case is mainly for shared projects and files out of the baseSourceFile path
+				return (item.GetMetadata("FullPath"), relativePath);
+			}
+			else if (item.GetMetadata("TargetPath") is { } targetPath && !string.IsNullOrEmpty(targetPath))
 			{
-				var fullPath = Path.IsPathRooted(item.ItemSpec) ? item.ItemSpec : Path.Combine(baseSourceFile, item.ItemSpec);
+				Log.LogMessage(MessageImportance.Low, $"TargetPath '{targetPath}' for full path '{item.GetMetadata("FullPath")}' (ItemSpec: {item.ItemSpec})");
 
 				// This is used for item remapping
-				return (fullPath, targetPath);
+				return (item.GetMetadata("FullPath"), targetPath);
 			}
 			else if (item.GetMetadata("Link") is { } link && !string.IsNullOrEmpty(link))
 			{
-				var fullPath = Path.IsPathRooted(item.ItemSpec) ? item.ItemSpec : Path.Combine(baseSourceFile, item.ItemSpec);
+				Log.LogMessage(MessageImportance.Low, $"Link '{link}' for full path '{item.GetMetadata("FullPath")}' (ItemSpec: {item.ItemSpec})");
 
 				// This case is mainly for shared projects and files out of the baseSourceFile path
-				return (fullPath, link);
+				return (item.GetMetadata("FullPath"), link);
 			}
 			else if (item.GetMetadata("FullPath") is { } fullPath && File.Exists(fullPath))
 			{
+				Log.LogMessage(MessageImportance.Low, $"FullPath '{fullPath}' (ItemSpec: {item.ItemSpec})");
+
 				var sourceFilePath = item.ItemSpec;
 
 				if (sourceFilePath.StartsWith(CurrentProjectPath))
@@ -242,7 +270,9 @@ private void Cleanup()
 			}
 			else
 			{
-				return (Path.Combine(baseSourceFile, item.ItemSpec), item.ItemSpec);
+				Log.LogMessage(MessageImportance.Low, $"Without metadata '{item.GetMetadata("FullPath")}' (ItemSpec: {item.ItemSpec})");
+
+				return (item.GetMetadata("FullPath"), item.ItemSpec);
 			}
 		}
 
@@ -331,9 +361,9 @@ private void ExtractAdditionalJS()
 			{
 				var (fullSourcePath, relativePath) = GetFilePaths(projectResource);
 
-				if (relativePath.Contains("WasmScripts"))
+				if (fullSourcePath.Contains("WasmScripts"))
 				{
-					var scriptName = Path.GetFileName(relativePath);
+					var scriptName = Path.GetFileName(fullSourcePath);
 
 					Log.LogMessage($"Embedded resources JS {scriptName}");
 
@@ -368,9 +398,9 @@ private void ExtractAdditionalCSS()
 			{
 				var (fullSourcePath, relativePath) = GetFilePaths(projectResource);
 
-				if (relativePath.Contains("WasmCSS"))
+				if (fullSourcePath.Contains("WasmCSS"))
 				{
-					var cssName = Path.GetFileName(relativePath);
+					var cssName = Path.GetFileName(fullSourcePath);
 
 					Log.LogMessage($"Embedded CSS {cssName}");
 
diff --git a/src/Uno.Wasm.Bootstrap/build/Uno.Wasm.Bootstrap.targets b/src/Uno.Wasm.Bootstrap/build/Uno.Wasm.Bootstrap.targets
index c9b9772e3..38cf47f61 100644
--- a/src/Uno.Wasm.Bootstrap/build/Uno.Wasm.Bootstrap.targets
+++ b/src/Uno.Wasm.Bootstrap/build/Uno.Wasm.Bootstrap.targets
@@ -237,7 +237,7 @@
 	</Target>
 
 	<Target Name="GenerateUnoWasmAssets"
-		BeforeTargets="ResolveProjectStaticWebAssets;_UnoWasmNativeForBuild"
+		BeforeTargets="ResolveStaticWebAssetsInputs;PrepareInputsForWasmBuild;ResolveJSModuleStaticWebAssets;_UnoWasmNativeForBuild"
 		DependsOnTargets="_UnoAdjustCompatibility">
 
 		<ItemGroup>
@@ -252,14 +252,14 @@
 				Include="@(_AllChildProjectItemsWithTargetPath)"
 				Condition=" '%(_AllChildProjectItemsWithTargetPath.CopyToOutputDirectory)' == 'PreserveNewest' OR '%(_AllChildProjectItemsWithTargetPath.CopyToOutputDirectory)' == 'Always' " />
 
-			<Content Remove="$(WasmPWAManifestFile)" />
+			<ContentWithTargetPath Remove="$(WasmPWAManifestFile)" />
 		</ItemGroup>
 
 		<ShellTask_v0
 			AotProfile="$(WasmAotProfilePath)"
 			Assembly="$(IntermediateOutputPath)$(TargetFileName)"
 			AssemblyName="$(AssemblyName)"
-			Assets="@(Content);@(_UnoWasmCopyToOutputAssets)"
+			Assets="@(ContentWithTargetPath);@(_UnoWasmCopyToOutputAssets)"
 			ContentExtensionsToExclude="$(WasmShellContentExtensionsToExclude)"
 			CSPConfiguration="$(WasmShellCSPConfiguration)"
 			CurrentProjectPath="$(MSBuildProjectDirectory)"
@@ -282,16 +282,38 @@
 			PWAManifestFile="$(WasmPWAManifestFile)"
 			ReferencePath="@(_UnoWasmBootstrapAssembliesForReferenceCopyLocalPaths)"
 			RunAOTCompilation="$(RunAOTCompilation)"
+			ExistingStaticWebAsset="@(StaticWebAsset)"
 			Optimize="$(Optimize)"
 			WasmBuildNative="$(WasmBuildNative)"
 			WasmShellMode="$(WasmShellMode)"
 			WebAppBasePath="$(WasmShellWebAppBasePath)"
 			>
-			<Output TaskParameter="StaticWebContent" ItemName="Content" />
+			<Output TaskParameter="StaticWebContent" ItemName="_UnoStaticWebContent" />
 			<Output TaskParameter="NativeFileReference" ItemName="NativeFileReference" />
 			<Output TaskParameter="FilteredAotProfile" PropertyName="_FilteredAotProfile" />
 		</ShellTask_v0>
 
+		<DefineStaticWebAssets
+		  CandidateAssets="@(_UnoStaticWebContent)"
+		  FingerprintCandidates="$(StaticWebAssetsFingerprintContent)"
+		  FingerprintPatterns="@(StaticWebAssetFingerprintPattern)"
+		  RelativePathPattern="wwwroot/**"
+		  SourceType="Discovered"
+		  SourceId="$(PackageId)"
+		  ContentRoot="$(MSBuildProjectDirectory)\wwwroot\"
+		  BasePath="$(StaticWebAssetBasePath)"
+		  AssetMergeSource="$(StaticWebAssetMergeTarget)">
+			<Output TaskParameter="Assets" ItemName="StaticWebAsset" />
+		</DefineStaticWebAssets>
+		
+		<DefineStaticWebAssetEndpoints
+			  CandidateAssets="@(StaticWebAsset)"
+			  ExistingEndpoints="@(StaticWebAssetEndpoint)"
+			  ContentTypeMappings="@(StaticWebAssetContentTypeMapping)"
+				>
+			<Output TaskParameter="Endpoints" ItemName="StaticWebAssetEndpoint" />
+		</DefineStaticWebAssetEndpoints>
+
 		<PropertyGroup Condition=" '$(_FilteredAotProfile)' != '' ">
 			<!-- Override the user's profile with the filtered one -->
 			<WasmAotProfilePath>$(_FilteredAotProfile)</WasmAotProfilePath>
diff --git a/src/Uno.Wasm.MixedModeSample/Uno.Wasm.MixedModeSample.csproj b/src/Uno.Wasm.MixedModeSample/Uno.Wasm.MixedModeSample.csproj
index 5331fcf43..85c1f2a1f 100644
--- a/src/Uno.Wasm.MixedModeSample/Uno.Wasm.MixedModeSample.csproj
+++ b/src/Uno.Wasm.MixedModeSample/Uno.Wasm.MixedModeSample.csproj
@@ -10,10 +10,6 @@
 		<WasmShellMonoRuntimeExecutionMode Condition="$([MSBuild]::IsOsPlatform('Linux'))">InterpreterAndAOT</WasmShellMonoRuntimeExecutionMode>
 	</PropertyGroup>
 
-	<ItemGroup>
-		<Folder Include="wwwroot\" />
-	</ItemGroup>
-
 	<ItemGroup>
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
 		<PackageReference Include="System.Collections.Immutable" Version="1.4.0" />
diff --git a/src/Uno.Wasm.MixedModeSample/wwwroot/dummy.json b/src/Uno.Wasm.MixedModeSample/wwwroot/dummy.json
new file mode 100644
index 000000000..0db3279e4
--- /dev/null
+++ b/src/Uno.Wasm.MixedModeSample/wwwroot/dummy.json
@@ -0,0 +1,3 @@
+{
+
+}
diff --git a/src/Uno.Wasm.Sample/Uno.Wasm.Sample.projitems b/src/Uno.Wasm.Sample/Uno.Wasm.Sample.projitems
index 8d930d462..0ad10c512 100644
--- a/src/Uno.Wasm.Sample/Uno.Wasm.Sample.projitems
+++ b/src/Uno.Wasm.Sample/Uno.Wasm.Sample.projitems
@@ -37,11 +37,11 @@
     <!-- Add linked content first to validate directory creation from links -->
     <Content Include="..\.editorconfig" Link="AdditionalContent\%(FileName)%(Extension)" />
     <Content Include="../nuget.config" Link="AdditionalContent\%(FileName)%(Extension)" />
-    <Content Include="AdditionalContent\SomeContent01.txt">
+    <Content Include="$(MSBuildThisFileDirectory)AdditionalContent\SomeContent01.txt">
       <UnoDeploy>Package</UnoDeploy>
     </Content>
-    <Content Include="AdditionalContent/SomeContent02.txt" />
-    <Content Include="AdditionalContent/SomeContent03.txt" UnoDeploy="Root" />
-    <Content Include="AdditionalContent/SomeContent04.txt" UnoDeploy="None" />
+    <Content Include="$(MSBuildThisFileDirectory)AdditionalContent/SomeContent02.txt" />
+    <Content Include="$(MSBuildThisFileDirectory)AdditionalContent/SomeContent03.txt" UnoDeploy="Root" />
+    <Content Include="$(MSBuildThisFileDirectory)AdditionalContent/SomeContent04.txt" UnoDeploy="None" />
   </ItemGroup>
 </Project>
\ No newline at end of file