chore(flake): use stable versions

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1643841757,
-        "narHash": "sha256-9tKhu4JzoZvustC9IEWK6wKcDhPLuK/ICbLgm8QnLnk=",
+        "lastModified": 1648942457,
+        "narHash": "sha256-i29Z1t3sVfCNfpp+KAfeExvpqHQSbLO1KWylTtfradU=",
         "owner": "ryantm",
         "repo": "agenix",
-        "rev": "a17d1f30550260f8b45764ddbd0391f4b1ed714a",
+        "rev": "0d5e59ed645e4c7b60174bc6f6aac6a203dc0b01",
         "type": "github"
       },
       "original": {
@@ -27,11 +27,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1645244400,
-        "narHash": "sha256-o7KCd6ySFZ9/LbS62aTeuFmBWtP7Tt3Q3RcNjYgTgZU=",
+        "lastModified": 1649392573,
+        "narHash": "sha256-dCPEJZzExz2+i7AjUuViZUgHC+JXDlBBG/IzuSYWCh8=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "0232fe1b75e6d7864fd82b5c72f6646f87838fc3",
+        "rev": "f911ebbec927e8e9b582f2e32e2b35f730074cfc",
         "type": "github"
       },
       "original": {
@@ -42,27 +42,27 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1645013224,
-        "narHash": "sha256-b7OEC8vwzJv3rsz9pwnTX2LQDkeOWz2DbKypkVvNHXc=",
+        "lastModified": 1649537291,
+        "narHash": "sha256-V6VYIwTeI5BCfYK9f5EsMbjsjsis1rUDHMsaDbTvt+A=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "b66b39216b1fef2d8c33cc7a5c72d8da80b79970",
+        "rev": "715dc137b08213aabbbe0965b78ab938e5d8d3b7",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixpkgs-unstable",
+        "ref": "nixos-21.11",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nur": {
       "locked": {
-        "lastModified": 1649019570,
-        "narHash": "sha256-99HAN9z7H6+6mlgKyJg6EsQPMbecC/RMDMD2OaR8Qi0=",
+        "lastModified": 1649616544,
+        "narHash": "sha256-ap2jAyuO4L3L9Lcps+5Z3dFWEVaVQ5K+S9llktEWZOo=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "ea7bb07da9fe8266808f9571ebf5ad009558b8b5",
+        "rev": "8b99063c43f918650827daa23a11203c70e8a328",
         "type": "github"
       },
       "original": {
@@ -76,7 +76,24 @@
         "agenix": "agenix",
         "homemanager": "homemanager",
         "nixpkgs": "nixpkgs",
-        "nur": "nur"
+        "nur": "nur",
+        "unstable": "unstable"
+      }
+    },
+    "unstable": {
+      "locked": {
+        "lastModified": 1649408932,
+        "narHash": "sha256-JhTW1OtS5fACcRXLqcTTQyYO5vLkO+bceCqeRms13SY=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "42948b300670223ca8286aaf916bc381f66a5313",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -3,7 +3,11 @@
 
   inputs = {
     nixpkgs = {
-      url = "github:nixos/nixpkgs/nixpkgs-unstable";
+      url = "github:nixos/nixpkgs/nixos-21.11";
+    };
+
+    unstable = {
+      url = "github:nixos/nixpkgs/nixos-unstable";
     };
 
     nur = {
@@ -23,6 +27,10 @@
 
   outputs = { self, nur, ... }@inputs:
     let
+      overlay-unstable = final: prev: {
+        unstable = inputs.unstable.legacyPackages.${prev.system};
+      };
+
       sharedNixosConfiguration = { config, pkgs, ... }: {
         nix = {
           package = pkgs.nixFlakes;
@@ -31,21 +39,19 @@
             experimental-features = nix-command flakes
           '';
 
-          settings = {
-            substituters = [
-              "https://cache.nixos.org"
-              "https://nix-community.cachix.org"
-              "https://nixpkgs.cachix.org"
-              "https://tboerger.cachix.org"
-            ];
+          binaryCaches = [
+            "https://cache.nixos.org"
+            "https://nix-community.cachix.org"
+            "https://nixpkgs.cachix.org"
+            "https://tboerger.cachix.org"
+          ];
 
-            trusted-public-keys = [
-              "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
-              "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-              "nixpkgs.cachix.org-1:q91R6hxbwFvDqTSDKwDAV4T5PxqXGxswD8vhONFMeOE="
-              "tboerger.cachix.org-1:3Q1gyqgA9NsOshOgknDvc6fhA8gw0PFAf2qs5vJpeLU="
-            ];
-          };
+          binaryCachePublicKeys = [
+            "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+            "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+            "nixpkgs.cachix.org-1:q91R6hxbwFvDqTSDKwDAV4T5PxqXGxswD8vhONFMeOE="
+            "tboerger.cachix.org-1:3Q1gyqgA9NsOshOgknDvc6fhA8gw0PFAf2qs5vJpeLU="
+          ];
 
           gc = {
             automatic = true;
@@ -63,6 +69,7 @@
           overlays = [
             self.overlay
             nur.overlay
+            overlay-unstable
           ];
         };
       };