diff --git a/.nuke/build.schema.json b/.nuke/build.schema.json
index 2b8f517709..f55ab7d61d 100644
--- a/.nuke/build.schema.json
+++ b/.nuke/build.schema.json
@@ -53,6 +53,7 @@
         "TestEventSourcing",
         "TestExtensions",
         "TestLinq",
+        "TestMemoryPack",
         "TestModularConfig",
         "TestMultiTenancy",
         "TestNodaTime",
diff --git a/build/build.cs b/build/build.cs
index a1049a1e0c..886357c43b 100644
--- a/build/build.cs
+++ b/build/build.cs
@@ -390,7 +390,13 @@ class Build : NukeBuild
                 "./src/Marten.NodaTime",
                 "./src/Marten.AspNetCore",
                 "./src/Marten.EntityFrameworkCore",
-                "./src/Marten.SourceGenerator"
+                "./src/Marten.SourceGenerator",
+                // New optional companion packages — must be listed here so
+                // the existing on-manual-do-nuget-publish.yml workflow picks
+                // them up. Without this they'd silently never reach NuGet.
+                "./src/Marten.PostGIS",        // PostGIS spatial support (#4576)
+                "./src/Marten.PgVector",       // pgvector similarity search (#4576)
+                "./src/Marten.MemoryPack"      // binary event serialization (#4515 / #4578)
             };
 
             foreach (var project in projects)