diff --git a/flake.nix b/flake.nix
index c67828d..574e108 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,8 +7,9 @@
 
   inputs = {
     # --- DevOS Flake Inputs
+    verystable.url = "github:nixos/nixpkgs/nixos-21.05";
+    stable.url = "github:nixos/nixpkgs/nixos-21.11";
     nixos.url = "github:nixos/nixpkgs/nixos-unstable";
-    # nixos.url = "github:nixos/nixpkgs";
     latest.url = "github:nixos/nixpkgs";
 
     digga.url = "github:divnix/digga";
@@ -164,6 +165,8 @@
               # inputs.polymc.overlay
             ];
           };
+          verystable = { };
+          stable = { };
           latest = { };
         };
 
diff --git a/overlays/overrides.nix b/overlays/overrides.nix
index 00d5445..3a41dd3 100644
--- a/overlays/overrides.nix
+++ b/overlays/overrides.nix
@@ -16,6 +16,10 @@ channels: final: prev: {
     deploy-rs
     ;
 
+  inherit (channels.verystable)
+    omnisharp-roselyn
+    ;
+
   haskellPackages = prev.haskellPackages.override
     (old: {
       overrides = prev.lib.composeExtensions (old.overrides or (_: _: { })) (hfinal: hprev: