diff --git a/flake.nix b/flake.nix
index c2758b0..55a7961 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,13 +3,16 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+    nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
   };
 
-  outputs = { self, nixpkgs }: {
+  outputs = { self, nixpkgs, ... }@inputs: {
 
     nixosConfigurations.thinknix = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [ ./nixos/configuration.nix ];
+      # necessary to make the top-level inputs available to system configuration
+      specialArgs = { inherit inputs; };
     };
   };
 }
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index af6b0f3..df6224e 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -2,10 +2,10 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, ... }:
+{ config, pkgs, lib, inputs, ... }:
 
 let
-  unstable = import <nixos-unstable> { };
+  unstable = inputs.nixos-unstable;
   localfork = import /home/spiollinux/src/nixpkgs { };
 
 in
@@ -234,15 +234,22 @@ in
   # Enable all sysrq functions (useful to recover from some issues):
   boot.kernel.sysctl."kernel.sysrq" = 1; # NixOS default: 16 (only the sync command)
 
+  nix = {
+    # expose all flake inputs through nix Path and registry
+    registry = (lib.mapAttrs (_: value: { flake = value; }) inputs) // {
+      nixpkgs.flake = inputs.nixpkgs;
+    };
+    nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
   # keep build-time deps around for offline-rebuilding
-  nix.settings = {
-    # keep around all inputs necessary for offline-rebuilding the system
-    keep-outputs = true;
-    keep-derivations = true;
-    trusted-users = [ "spiollinux" ];
-    experimental-features = [ "nix-command" "flakes" ];
-    # use all cores for building
-    cores = 0;
+    settings = {
+      # keep around all inputs necessary for offline-rebuilding the system
+      keep-outputs = true;
+      keep-derivations = true;
+      trusted-users = [ "spiollinux" ];
+      experimental-features = [ "nix-command" "flakes" ];
+      # use all cores for building
+      cores = 0;
+    };
   };
   # override tmpdir for daemon
   #systemd.services.nix-daemon.environment.TMPDIR = "/var/tmp";