diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f83ff55..3278d8c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -96,7 +96,7 @@ jobs:
       run: dotnet build --configuration Release --no-restore
 
     - name: Pack
-      run: dotnet pack --configuration Release --no-build --output nupkgs
+      run: dotnet pack IronJava.Core/IronJava.Core.csproj --configuration Release --no-build --output nupkgs
 
     - name: Upload NuGet package
       uses: actions/upload-artifact@v4
diff --git a/IronJava.Benchmarks/IronJava.Benchmarks.csproj b/IronJava.Benchmarks/IronJava.Benchmarks.csproj
index 5420fdb..bd247ce 100644
--- a/IronJava.Benchmarks/IronJava.Benchmarks.csproj
+++ b/IronJava.Benchmarks/IronJava.Benchmarks.csproj
@@ -5,6 +5,7 @@
     <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/IronJava.Sample/IronJava.Sample.csproj b/samples/IronJava.Sample/IronJava.Sample.csproj
index dc31b22..fdaf504 100644
--- a/samples/IronJava.Sample/IronJava.Sample.csproj
+++ b/samples/IronJava.Sample/IronJava.Sample.csproj
@@ -5,6 +5,7 @@
     <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>