remove NIX_PATH settings

flake.nix

@@ -14,20 +14,6 @@
 
       forAllSystems = lib.genAttrs [ "x86_64-linux" ];
 
-      pins = {
-        nix.registry.nixpkgs.to = {
-          inherit (nixpkgs) rev;
-          owner = "NixOS";
-          repo = "nixpkgs";
-          type = "github";
-        };
-        nix.registry.bck.to = {
-          owner = "buckley310";
-          repo = "nixos-config";
-          type = "github";
-        };
-      };
-
     in
     {
       formatter = forAllSystems (system:
@@ -47,9 +33,13 @@
 
       nixosModules =
         {
-          inherit pins;
           inherit (impermanence.nixosModules) impermanence;
           pkgs.nixpkgs.overlays = [ (_: mypkgs) ];
+          pins.nix.registry.bck.to = {
+            owner = "buckley310";
+            repo = "nixos-config";
+            type = "github";
+          };
         } //
         self.lib.dirToAttrs ./modules import;
 

modules/baseline.nix

@@ -38,7 +38,7 @@
   networking.usePredictableInterfaceNames = lib.mkDefault false;
 
   nix = {
-    nixPath = [ ];
+    nixPath = [ "nixpkgs=flake:nixpkgs" ];
     extraOptions = ''
       experimental-features = nix-command flakes
     '';

modules/cli/default.nix

@@ -163,16 +163,5 @@
     alias day='date "+%Y-%m-%d"'
     alias grep='grep --color=auto'
     alias tmp='cd "$(mktemp -d)"'
-  '' +
+  '';
-  # compatibility for programs that need $NIX_PATH set:
-  lib.concatMapStrings
-    (x: ''
-      alias ${x}='NIX_PATH="nixpkgs=$(nix eval nixpkgs#path)" ${x}'
-    '')
-    [
-      "nix-build"
-      "nix-index"
-      "nix-prefetch-github"
-      "nix-shell"
-    ];
 }