diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9fae3383572..5efa404f472 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,6 +69,25 @@ jobs:
         if: runner.os == 'Windows'
       - name: Install psycopg2
         run: python -m pip install psycopg2-binary
+      - name: Build and pack C# SDK
+        run: |
+          cd sdks/csharp
+          dotnet build SpacetimeDB.ClientSDK.csproj -c Release
+          dotnet pack SpacetimeDB.ClientSDK.csproj -c Release -o ../../nupkgs
+          cat > NuGet.config << EOF
+          <?xml version="1.0" encoding="utf-8"?>
+          <configuration>
+            <packageSources>
+              <add key="local" value="$(pwd)/../../nupkgs" />
+              <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+            </packageSources>
+            <packageSourceMapping>
+              <packageSource key="local">
+                <package pattern="SpacetimeDB.*" />
+              </packageSource>
+            </packageSourceMapping>
+          </configuration>
+          EOF
       - name: Run smoketests
         # Note: clear_database and replication only work in private
         run: python -m smoketests ${{ matrix.smoketest_args }} -x clear_database replication
diff --git a/.github/workflows/csharp-test.yml b/.github/workflows/csharp-test.yml
index c6721481fef..1e1671881e6 100644
--- a/.github/workflows/csharp-test.yml
+++ b/.github/workflows/csharp-test.yml
@@ -38,6 +38,7 @@ jobs:
           # if they're not pushed to NuGet.
           # See https://learn.microsoft.com/en-us/nuget/reference/nuget-config-file for more info on the config file.
           cd sdks/csharp
+          dotnet pack SpacetimeDB.ClientSDK.csproj -o ../../nupkgs
           ./tools~/write-nuget-config.sh ../..
 
       - name: Run .NET tests
@@ -126,6 +127,9 @@ jobs:
 
       - name: Run regression tests
         run: |
+          cd sdks/csharp
+          dotnet build
+          cd ../..
           bash sdks/csharp/tools~/run-regression-tests.sh
           tools/check-diff.sh sdks/csharp/examples~/regression-tests || {
               echo 'Error: Bindings are dirty. Please run `sdks/csharp/tools~/gen-regression-tests.sh`.'
diff --git a/smoketests/tests/quickstart.py b/smoketests/tests/quickstart.py
index 4b67578f559..838ddad2eb7 100644
--- a/smoketests/tests/quickstart.py
+++ b/smoketests/tests/quickstart.py
@@ -45,15 +45,7 @@ def _parse_quickstart(doc_path: Path, language: str) -> str:
 
 
 def _dotnet_add_package(project_path: Path, package_name: str, source_path: Path):
-    """Add a local NuGet package to a .NET project"""
-    sources = run_cmd("dotnet", "nuget", "list", "source", cwd=project_path, capture_stderr=True)
-    # Is the source already added?
-    if package_name in sources:
-        run_cmd("dotnet", "nuget", "remove", "source", package_name, cwd=project_path, capture_stderr=True)
-    run_cmd("dotnet", "nuget", "add", "source", source_path, "--name", package_name, cwd=project_path,
-            capture_stderr=True)
-    run_cmd("dotnet", "add", "package", package_name, cwd=project_path, capture_stderr=True)
-
+    """Skipping adding a local NuGet package to a .NET project"""
 
 class BaseQuickstart(Smoketest):
     AUTOPUBLISH = False