Update flake.lock

flake.lock

@@ -204,11 +204,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1722321190,
-        "narHash": "sha256-WeVWVRqkgrbLzmk6FfJoloJ7Xe7HWD27Pv950IUG2kI=",
+        "lastModified": 1722462338,
+        "narHash": "sha256-ss0G8t8RJVDewA3MyqgAlV951cWRK6EtVhVKEZ7J5LU=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "4fcd54df7cbb1d79cbe81209909ee8514d6b17a4",
+        "rev": "6e090576c4824b16e8759ebca3958c5b09659ee8",
         "type": "github"
       },
       "original": {
@@ -346,11 +346,11 @@
     },
     "nixpkgs-stable_2": {
       "locked": {
-        "lastModified": 1722221733,
-        "narHash": "sha256-sga9SrrPb+pQJxG1ttJfMPheZvDOxApFfwXCFO0H9xw=",
+        "lastModified": 1722372011,
+        "narHash": "sha256-B2xRiC3NEJy/82ugtareBkRqEkPGpMyjaLxaR8LBxNs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "12bf09802d77264e441f48e25459c10c93eada2e",
+        "rev": "cf05eeada35e122770c5c14add958790fcfcbef5",
         "type": "github"
       },
       "original": {
@@ -378,11 +378,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1722185531,
-        "narHash": "sha256-veKR07psFoJjINLC8RK4DiLniGGMgF3QMlS4tb74S6k=",
+        "lastModified": 1722421184,
+        "narHash": "sha256-/DJBI6trCeVnasdjUo9pbnodCLZcFqnVZiLUfqLH4jA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "52ec9ac3b12395ad677e8b62106f0b98c1f8569d",
+        "rev": "9f918d616c5321ad374ae6cb5ea89c9e04bf3e58",
         "type": "github"
       },
       "original": {

flake.nix

@@ -114,10 +114,37 @@
       } // machinesNodes;
 
       formatter = builtins.listToAttrs (
-        map (system: {
+        map (
+          system:
+          let
+            pkgs = import nixpkgsVersions.unstable { inherit system; };
+          in
+          {
             name = system;
-          value = nixpkgsVersions.unstable.legacyPackages.${system}.nixfmt-rfc-style;
-        }) flake-utils.lib.defaultSystems
+            value = pkgs.nixfmt-rfc-style;
+          }
+        ) flake-utils.lib.defaultSystems
+      );
+
+      devShells = builtins.listToAttrs (
+        map (
+          system:
+          let
+            pkgs = import nixpkgsVersions.unstable { inherit system; };
+          in
+          {
+            name = system;
+            value = pkgs.mkShell {
+              name = "Nix development environment";
+
+              packages = with pkgs; [
+                colmena
+                nixfmt-rfc-style
+                nil
+              ];
+            };
+          }
+        ) flake-utils.lib.defaultSystems
       );
     };
 }