diff --git a/hosts/modules/apps/rider.nix b/hosts/modules/apps/rider.nix
index 94ac874..d7b3a1c 100644
--- a/hosts/modules/apps/rider.nix
+++ b/hosts/modules/apps/rider.nix
@@ -14,7 +14,9 @@
 
     # Mono
     mono
-    msbuild
+    # NOTE: nixpkgs-unstable uses .NET8 SDK
+    # WARNING: nixpkgs-25.05 uses .NET6 SDK (now marked insecure)
+    pkgs-unstable.msbuild
 
     # .NET Framework Tools/Services
     omnisharp-roslyn