inputs.nix: Add dependency de-duplication rules

1 files changed, 75 insertions, 0 deletions

diff --git a/inputs.nix b/inputs.nix
index ccf2e2af..c899f356 100644
--- a/inputs.nix
+++ b/inputs.nix
@@ -1,7 +1,82 @@
 let
   nixpkgsVersion = "26.05";
+  nixos-stable = "nixos-${nixpkgsVersion}";
+
   lanzabooteVersion = "v1.1.0";
+
+  w_nixpkgs = ref: {
+    type = "github";
+    owner = "nixos";
+    repo = "nixpkgs";
+    inherit ref;
+  };
 in {
+  _unflake.dedupRules = [
+    {
+      when = w_nixpkgs "nixpkgs-unstable";
+      set = {ref = "nixos-unstable";};
+    }
+    {
+      when = w_nixpkgs "nixos-unstable-small";
+      set = {ref = "nixos-unstable";};
+    }
+    {
+      when = w_nixpkgs "nixos-25.05";
+      set = {ref = nixos-stable;};
+    }
+    {
+      when = w_nixpkgs "nixos-25.11";
+      set = {ref = nixos-stable;};
+    }
+    {
+      when = w_nixpkgs "nixos-26.05";
+      set = {ref = nixos-stable;};
+    }
+
+    {
+      when = {
+        type = "github";
+        owner = "nix-community";
+        repo = "home-manager";
+      };
+
+      set = {ref = "master";};
+    }
+
+    {
+      when = {
+        type = "github";
+        owner = "nix-systems";
+        repo = "default";
+      };
+
+      set = {ref = "main";};
+    }
+    {
+      when = {
+        type = "github";
+        owner = "nix-systems";
+        repo = "x86_64-linux";
+      };
+
+      set = {
+        repo = "default";
+        ref = "main";
+      };
+    }
+
+    {
+      when = {
+        type = "github";
+        owner = "numtide";
+        repo = "treefmt-nix";
+      };
+
+      set = {ref = "main";};
+    }
+  ];
+
+  # Actual inputs
   "agenix" = {
     url = "github:ryantm/agenix/main";
   };