diff --git a/src/EntityFrameworkCore.Projectables.Abstractions/EntityFrameworkCore.Projectables.Abstractions.csproj b/src/EntityFrameworkCore.Projectables.Abstractions/EntityFrameworkCore.Projectables.Abstractions.csproj
index aa3fda4..1a51f7c 100644
--- a/src/EntityFrameworkCore.Projectables.Abstractions/EntityFrameworkCore.Projectables.Abstractions.csproj
+++ b/src/EntityFrameworkCore.Projectables.Abstractions/EntityFrameworkCore.Projectables.Abstractions.csproj
@@ -18,10 +18,50 @@
 	</ProjectReference>
   </ItemGroup>
 
+  <PropertyGroup>
+    <_AnalyzerVariantsDir>..\..\artifacts\analyzer-variants</_AnalyzerVariantsDir>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <_RoslynVariant Include="4.8.0">
+      <Folder>roslyn4.8</Folder>
+    </_RoslynVariant>
+    <_RoslynVariant Include="5.0.0">
+      <Folder>roslyn5.0</Folder>
+    </_RoslynVariant>
+  </ItemGroup>
+
+  <Target Name="_BuildAnalyzerVariants" BeforeTargets="GenerateNuspec" Condition="'$(NoBuild)' != 'true'">
+    <MSBuild
+      Projects="..\EntityFrameworkCore.Projectables.Generator\EntityFrameworkCore.Projectables.Generator.csproj"
+      Targets="Restore;Build"
+      Properties="Configuration=$(Configuration);RoslynAnalyzerVersion=%(_RoslynVariant.Identity);BaseOutputPath=$(_AnalyzerVariantsDir)\Generator-%(_RoslynVariant.Folder)\bin\;BaseIntermediateOutputPath=$(_AnalyzerVariantsDir)\Generator-%(_RoslynVariant.Folder)\obj\"
+      RemoveProperties="TargetFramework" />
+    <MSBuild
+      Projects="..\EntityFrameworkCore.Projectables.CodeFixes\EntityFrameworkCore.Projectables.CodeFixes.csproj"
+      Targets="Restore;Build"
+      Properties="Configuration=$(Configuration);RoslynAnalyzerVersion=%(_RoslynVariant.Identity);BaseOutputPath=$(_AnalyzerVariantsDir)\CodeFixes-%(_RoslynVariant.Folder)\bin\;BaseIntermediateOutputPath=$(_AnalyzerVariantsDir)\CodeFixes-%(_RoslynVariant.Folder)\obj\"
+      RemoveProperties="TargetFramework" />
+  </Target>
+
+  <Target Name="_CheckAnalyzerVariants" BeforeTargets="GenerateNuspec" Condition="'$(NoBuild)' == 'true'">
+    <Error Condition="!Exists('$(_AnalyzerVariantsDir)\Generator-roslyn4.8\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.Generator.dll') OR !Exists('$(_AnalyzerVariantsDir)\Generator-roslyn5.0\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.Generator.dll')"
+           Text="Roslyn-variant analyzer DLLs are missing under '$(_AnalyzerVariantsDir)'. Run 'dotnet pack' without --no-build to produce them." />
+  </Target>
+
+  <Target Name="_CleanAnalyzerVariants" AfterTargets="Clean">
+    <RemoveDir Directories="$(_AnalyzerVariantsDir)\Generator-%(_RoslynVariant.Folder);$(_AnalyzerVariantsDir)\CodeFixes-%(_RoslynVariant.Folder)" />
+  </Target>
+
   <ItemGroup>
-	<!-- Package the generator and the code fix provider in the analyzer directory of the nuget package -->
-    <None Include="..\EntityFrameworkCore.Projectables.Generator\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.Generator.dll" Pack="true" PackagePath="analyzers/dotnet/cs" Visible="false" />
-    <None Include="..\EntityFrameworkCore.Projectables.CodeFixes\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.CodeFixes.dll" Pack="true" PackagePath="analyzers/dotnet/cs" Visible="false" />
+    <None Include="$(_AnalyzerVariantsDir)\Generator-roslyn4.8\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.Generator.dll"
+          Pack="true" PackagePath="analyzers/dotnet/roslyn4.8/cs" Visible="false" />
+    <None Include="$(_AnalyzerVariantsDir)\CodeFixes-roslyn4.8\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.CodeFixes.dll"
+          Pack="true" PackagePath="analyzers/dotnet/roslyn4.8/cs" Visible="false" />
+    <None Include="$(_AnalyzerVariantsDir)\Generator-roslyn5.0\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.Generator.dll"
+          Pack="true" PackagePath="analyzers/dotnet/roslyn5.0/cs" Visible="false" />
+    <None Include="$(_AnalyzerVariantsDir)\CodeFixes-roslyn5.0\bin\$(Configuration)\netstandard2.0\EntityFrameworkCore.Projectables.CodeFixes.dll"
+          Pack="true" PackagePath="analyzers/dotnet/roslyn5.0/cs" Visible="false" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/EntityFrameworkCore.Projectables.CodeFixes/EntityFrameworkCore.Projectables.CodeFixes.csproj b/src/EntityFrameworkCore.Projectables.CodeFixes/EntityFrameworkCore.Projectables.CodeFixes.csproj
index 6f93b2e..aa0ba1f 100644
--- a/src/EntityFrameworkCore.Projectables.CodeFixes/EntityFrameworkCore.Projectables.CodeFixes.csproj
+++ b/src/EntityFrameworkCore.Projectables.CodeFixes/EntityFrameworkCore.Projectables.CodeFixes.csproj
@@ -6,6 +6,10 @@
     <NoWarn>$(NoWarn);NU5128</NoWarn>
     <IsPackable>false</IsPackable>
     <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
+    <!-- See Generator.csproj for rationale. Excludes the canonical bin/obj from the
+         auto-Compile glob so the Roslyn-variant build doesn't pick up AssemblyInfo
+         duplicates from the cascaded ProjectReference build. -->
+    <DefaultItemExcludes>$(DefaultItemExcludes);bin\**;obj\**</DefaultItemExcludes>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/EntityFrameworkCore.Projectables.Generator/EntityFrameworkCore.Projectables.Generator.csproj b/src/EntityFrameworkCore.Projectables.Generator/EntityFrameworkCore.Projectables.Generator.csproj
index fea4940..31008f3 100644
--- a/src/EntityFrameworkCore.Projectables.Generator/EntityFrameworkCore.Projectables.Generator.csproj
+++ b/src/EntityFrameworkCore.Projectables.Generator/EntityFrameworkCore.Projectables.Generator.csproj
@@ -6,13 +6,21 @@
 	<NoWarn>$(NoWarn);NU5128</NoWarn>
 	<IsPackable>false</IsPackable>
 	<EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
+	<!-- Exclude bin/ and obj/ from auto-Compile glob unconditionally. For canonical builds
+	     this duplicates the SDK's existing exclusion (no-op). For Roslyn-variant builds
+	     (BaseOutputPath/BaseIntermediateOutputPath relocated outside the project), it
+	     prevents the canonical obj/ — populated by the cascaded ProjectReference build
+	     in the same pack invocation — from being picked up and CS0579-conflicting with
+	     the variant's own generated AssemblyInfo.cs. -->
+	<DefaultItemExcludes>$(DefaultItemExcludes);bin\**;obj\**</DefaultItemExcludes>
   </PropertyGroup>
 
-  <!-- Define ROSLYN_5_0_OR_LATER when building with .NET SDK 10+ (NETCoreSdkVersion is set by
-       Microsoft.NET.Sdk.props, which runs before this project file body is evaluated).
-       This enables C# 14 extension-type support in the generator code.
-       On SDK 9 the constant is absent and extension block members are skipped safely. -->
-  <PropertyGroup Condition="'$(NETCoreSdkVersion)' != '' AND $([MSBuild]::VersionGreaterThanOrEquals('$(NETCoreSdkVersion)', '10.0.0'))">
+  <!-- Define ROSLYN_5_0_OR_LATER when compiling against Roslyn 5.0+ reference assemblies.
+       Keyed off $(RoslynAnalyzerVersion) (auto-detected in Directory.Build.props, or
+       overridden by the dual-build target in EntityFrameworkCore.Projectables.Abstractions.csproj)
+       so a recursive build with RoslynAnalyzerVersion=4.8.0 produces a Roslyn-4.8-compatible
+       DLL even on a host running .NET SDK 10. -->
+  <PropertyGroup Condition="'$(RoslynAnalyzerVersion)' != '' AND $([MSBuild]::VersionGreaterThanOrEquals('$(RoslynAnalyzerVersion)', '5.0.0'))">
     <DefineConstants>$(DefineConstants);ROSLYN_5_0_OR_LATER</DefineConstants>
   </PropertyGroup>