diff --git a/Harmony/Harmony.csproj b/Harmony/Harmony.csproj
index 7950eb85..e80a3b5d 100644
--- a/Harmony/Harmony.csproj
+++ b/Harmony/Harmony.csproj
@@ -87,6 +87,15 @@
 		<!-- Reference assemblies are needed for non-Windows .NET Framework targeting builds. -->
 		<PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" PrivateAssets="all" />
 		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
+		<!-- Ensure the ref assemblies for .NET Core are on disk.
+			Needed by ILRepack to resolve framework references for each platform.
+			Ensures the build (ILRepack task) can work without having all these versions installed. -->
+		<PackageReference Condition="$(TargetFramework) == 'netcoreapp3.0'" Include="Microsoft.NetCore.App.Ref" Version="3.0.0" ExcludeAssets="all" PrivateAssets="all" GeneratePathProperty="true" />
+		<PackageReference Condition="$(TargetFramework) == 'netcoreapp3.1'" Include="Microsoft.NetCore.App.Ref" Version="3.1.0" ExcludeAssets="all" PrivateAssets="all" GeneratePathProperty="true" />
+		<PackageReference Condition="$(TargetFramework) == 'net5.0'" Include="Microsoft.NetCore.App.Ref" Version="5.0.0" ExcludeAssets="all" PrivateAssets="all" GeneratePathProperty="true" />
+		<PackageReference Condition="$(TargetFramework) == 'net6.0'" Include="Microsoft.NetCore.App.Ref" Version="6.0.0" ExcludeAssets="all" PrivateAssets="all" GeneratePathProperty="true" />
+		<PackageReference Condition="$(TargetFramework) == 'net7.0'" Include="Microsoft.NetCore.App.Ref" Version="7.0.0" ExcludeAssets="all" PrivateAssets="all" GeneratePathProperty="true" />
+		<PackageReference Condition="$(TargetFramework) == 'net8.0'" Include="Microsoft.NetCore.App.Ref" Version="8.0.0" ExcludeAssets="all" PrivateAssets="all" GeneratePathProperty="true" />
 	</ItemGroup>
 
 	<!-- netstandard2.0 reference assemblies -->
diff --git a/ILRepack.targets b/ILRepack.targets
index ca906eb9..eb2de210 100644
--- a/ILRepack.targets
+++ b/ILRepack.targets
@@ -8,8 +8,17 @@
 		<ItemGroup>
 			<InputAssemblies Include="$(OutputPath)\*.dll" />
 		</ItemGroup>
+		<ItemGroup>
+			<LibraryPath Condition="$(TargetFramework) == 'netcoreapp3.0'" Include="$(PkgMicrosoft_NetCore_App_Ref)\ref\netcoreapp3.0" />
+			<LibraryPath Condition="$(TargetFramework) == 'netcoreapp3.1'" Include="$(PkgMicrosoft_NetCore_App_Ref)\ref\netcoreapp3.1" />
+			<LibraryPath Condition="$(TargetFramework) == 'net5.0'" Include="$(PkgMicrosoft_NetCore_App_Ref)\ref\net5.0" />
+			<LibraryPath Condition="$(TargetFramework) == 'net6.0'" Include="$(PkgMicrosoft_NetCore_App_Ref)\ref\net6.0" />
+			<LibraryPath Condition="$(TargetFramework) == 'net7.0'" Include="$(PkgMicrosoft_NetCore_App_Ref)\ref\net7.0" />
+			<LibraryPath Condition="$(TargetFramework) == 'net8.0'" Include="$(PkgMicrosoft_NetCore_App_Ref)\ref\net8.0" />
+		</ItemGroup>
 		<ILRepack
 			InputAssemblies="@(InputAssemblies)"
+			LibraryPath="@(LibraryPath)"
 			OutputFile="$(OutputPath)\$(AssemblyName).dll"
 			DebugInfo="$(DebugInfo)"
 			CopyAttributes="false"