diff --git a/pkgs/by-name/fs/fsautocomplete/package.nix b/pkgs/by-name/fs/fsautocomplete/package.nix
index f4e3b7d743927..37b85a730f79d 100644
--- a/pkgs/by-name/fs/fsautocomplete/package.nix
+++ b/pkgs/by-name/fs/fsautocomplete/package.nix
@@ -26,13 +26,8 @@ buildDotnetModule (finalAttrs: rec {
       --replace-fail TargetFrameworks TargetFramework \
   '';
 
-  dotnet-sdk =
-    with dotnetCorePackages;
-    combinePackages [
-      sdk_8_0
-      sdk_9_0
-    ];
-  dotnet-runtime = dotnetCorePackages.sdk_9_0;
+  dotnet-sdk = dotnetCorePackages.sdk_8_0;
+  dotnet-runtime = dotnetCorePackages.sdk_8_0;
 
   projectFile = "src/FsAutoComplete/FsAutoComplete.fsproj";
   executables = [ "fsautocomplete" ];
diff --git a/pkgs/by-name/na/naps2/package.nix b/pkgs/by-name/na/naps2/package.nix
index 93161f889efd8..ad5241cf2ee8e 100644
--- a/pkgs/by-name/na/naps2/package.nix
+++ b/pkgs/by-name/na/naps2/package.nix
@@ -26,7 +26,19 @@ buildDotnetModule rec {
 
   executables = [ "naps2" ];
 
-  dotnet-sdk = with dotnetCorePackages; combinePackages [ sdk_6_0 sdk_8_0 ];
+  dotnet-sdk =
+    with dotnetCorePackages;
+    sdk_8_0
+    // {
+      inherit
+        (combinePackages [
+          sdk_8_0
+          sdk_6_0
+        ])
+        packages
+        targetPackages
+        ;
+    };
   dotnet-runtime = dotnetCorePackages.runtime_8_0;
   selfContainedBuild = true;
   runtimeDeps = [
diff --git a/pkgs/games/space-station-14-launcher/space-station-14-launcher.nix b/pkgs/games/space-station-14-launcher/space-station-14-launcher.nix
index 9ad8c3b335f60..c5b1da7f57c88 100644
--- a/pkgs/games/space-station-14-launcher/space-station-14-launcher.nix
+++ b/pkgs/games/space-station-14-launcher/space-station-14-launcher.nix
@@ -55,8 +55,7 @@ buildDotnetModule rec {
     updateScript = ./update.sh;
   };
 
-  # SDK 6.0 required for Robust.LoaderApi
-  dotnet-sdk = with dotnetCorePackages; combinePackages [ sdk_8_0 sdk_6_0 ];
+  dotnet-sdk = dotnetCorePackages.sdk_8_0;
   dotnet-runtime = dotnetCorePackages.runtime_8_0;
 
   dotnetFlags = [