home/nix-direnv: use unreleased version from flake

necessary to get integrated [GC root
refreshing](https://github.com/nix-community/nix-direnv/pull/631).

It currently looks like nix-direnv is going to be integrated into direnv
itself, so maybe nor new releases will be made until then.

flake.lock

@@ -53,6 +53,27 @@
       }
     },
     "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "nix-direnv",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1768135262,
+        "narHash": "sha256-PVvu7OqHBGWN16zSi6tEmPwwHQ4rLPU9Plvs8/1TUBY=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "80daad04eddbbf5a4d883996a73f3f542fa437ac",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-parts_3": {
       "inputs": {
         "nixpkgs-lib": [
           "nur",
@@ -177,6 +198,28 @@
         "type": "github"
       }
     },
+    "nix-direnv": {
+      "inputs": {
+        "flake-parts": "flake-parts_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1768704530,
+        "narHash": "sha256-BASsdRYo8t/himZisgWW524t86pxuC0H3/Dv8sqR8sM=",
+        "owner": "nix-community",
+        "repo": "nix-direnv",
+        "rev": "29bb68202897f6e8653d28f64c5525c2c502f19c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-direnv",
+        "type": "github"
+      }
+    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1769302137,
@@ -259,7 +302,7 @@
     },
     "nur": {
       "inputs": {
-        "flake-parts": "flake-parts_2",
+        "flake-parts": "flake-parts_3",
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
@@ -308,11 +351,12 @@
         "lanzaboote": "lanzaboote",
         "mysecrets": "mysecrets",
         "nix-darwin": "nix-darwin",
+        "nix-direnv": "nix-direnv",
         "nixos-hardware": "nixos-hardware",
         "nixos-unstable": "nixos-unstable",
         "nixpkgs": "nixpkgs_2",
         "nur": "nur",
-        "treefmt-nix": "treefmt-nix",
+        "treefmt-nix": "treefmt-nix_2",
         "utils": "utils"
       }
     },
@@ -353,6 +397,27 @@
       }
     },
     "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nix-direnv",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1768158989,
+        "narHash": "sha256-67vyT1+xClLldnumAzCTBvU0jLZ1YBcf4vANRWP3+Ak=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "e96d59dff5c0d7fddb9d113ba108f03c3ef99eca",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    },
+    "treefmt-nix_2": {
       "inputs": {
         "nixpkgs": [
           "nixpkgs"

flake.nix

@@ -29,6 +29,11 @@
       flake = false;
       url = "git+ssh://gitea@git.orlives.de:2342/schmittlauch/home-manager_secrets.git";
     };
+    nix-direnv = {
+      url = "github:nix-community/nix-direnv";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
   };
 
   outputs =

home/common.nix

@@ -19,7 +19,11 @@
   programs.bat.enable = true;
   programs.direnv = {
     enable = true;
-    nix-direnv.enable = true;
+    nix-direnv = {
+      enable = true;
+      # use a more recent nix-direnv to get the _nix_refresh_gcroots integration
+      package = inputs.nix-direnv.packages."${pkgs.stdenv.hostPlatform.system}".nix-direnv;
+    };
     enableZshIntegration = true;
   };
 
@@ -51,7 +55,7 @@
       merge.tool = "vimdiff";
       # provide `git mergetool -t nixfmt`
       mergetool.nixfmt = {
-        cmd = "${lib.getExe pkgs.nixfmt-rfc-style} --mergetool \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"";
+        cmd = "${lib.getExe pkgs.nixfmt} --mergetool \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"";
         trustExitCode = true;
       };
       core.excludesfile = toString (

home/modules/packages.nix

@@ -90,7 +90,7 @@ let
 
   nixHelpers = [
     nixpkgs-review
-    nixfmt-rfc-style
+    nixfmt
     nix-top
     statix
   ];

home/modules/vscodium.nix

@@ -74,7 +74,7 @@
             "editor.formatOnSave" = false;
             "editor.formatOnType" = false;
           };
-          "nix.formatterPath" = lib.getExe pkgs.nixfmt-rfc-style;
+          "nix.formatterPath" = lib.getExe pkgs.nixfmt;
           "nix.enableLanguageServer" = true;
           "nix.serverPath" = lib.getExe pkgs.nixd;
           "nix.serverSettings" = { };

home/overlays.nix

@@ -1,10 +1,8 @@
 [
-  (self: super: rec {
-    myVim =
-      with super;
-      neovim.override {
+  (self: super: {
+    myVim = super.neovim.override {
       configure = {
-          packages.myVimPackage = with pkgs.vimPlugins; {
+        packages.myVimPackage = with self.pkgs.vimPlugins; {
           # loaded on start
           start = [
             ale