Use impurity.nix

modules/devenv/flake.nix

@@ -10,6 +10,8 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    impurity.url = "github:outfoxxed/impurity.nix";
+
     emacs-overlay = {
       url = "github:nix-community/emacs-overlay?rev=b7a065e692e944e6b68d4285013ca426a8de6663";
       inputs.nixpkgs.follows = "nixpkgs";

modules/impurity.nix

@@ -1,43 +1,5 @@
-self: { lib, config, pkgs, ... }: with lib; let
-  relativePath = path: assert types.path.check path;
-    with builtins; strings.removePrefix (toString self) (toString path);
+{ self, inputs, ... }: {
+  imports = [ inputs.impurity.nixosModules.impurity ];
 
-  impurityGroupEnabled = group: let
-    impurityGroups = strings.splitString " " (builtins.getEnv "IMPURITY_GROUPS");
-  in group == "" || builtins.elem group impurityGroups;
-
-  impurePath = let
-    impurePathEnv = builtins.getEnv "IMPURITY_PATH";
-  in if impurePathEnv == ""
-     then throw "impurity.enable is true but IMPURITY_PATH is not set"
-     else impurePathEnv;
-
-  createImpurePath = path: let
-    relative = (relativePath path);
-    full = impurePath + relative;
-  in pkgs.runCommand "impurity-${relative}" {} "ln -s ${full} $out";
-
-in {
-  options.impurity.enable = mkOption {
-    type = types.bool;
-    default = false;
-    description = "Enable impure symlinks";
-  };
-
-  config._module.args.impurity = rec {
-    groupedLink = groupspec: path:
-      assert types.path.check path; let
-        groups =
-          if groupspec == null
-          then [ "" ]
-          else if (types.listOf types.string).check groupspec
-               then groupspec
-               else assert types.string.check groupspec;
-                 strings.splitString " " groupspec;
-      in if config.impurity.enable && lists.any (group: impurityGroupEnabled group) groups
-         then createImpurePath path
-         else path;
-
-    link = path: groupedLink null path;
-  };
+  impurity.configRoot = self;
 }

modules/user/default.nix

@@ -1,4 +1,4 @@
-{ system, inputs, config, lib, impurity, ... }: let
+{ self, system, inputs, config, lib, impurity, ... }: let
   username = "admin";
   homeDirectory = "/home/${username}";
 in {
@@ -23,7 +23,7 @@ in {
 
     home-manager = {
       extraSpecialArgs = {
-        inherit system inputs impurity;
+        inherit self system inputs impurity;
       };
 
       # use system nixpkgs instead of home-manager nixpkgs