Refactor

default.nix

@@ -2,11 +2,10 @@
 
 with lib;
 with lib.my;
-with inputs;
 {
   imports =
     # I use home-manager to deploy files to $HOME; little else
-    [ home-manager.nixosModules.home-manager ]
+    [ inputs.home-manager.nixosModules.home-manager ]
     # All my personal modules
     ++ (mapModulesRec' (toString ./modules) import);
 
@@ -16,26 +15,27 @@ with inputs;
 
   # Configure nix and nixpkgs
   environment.variables.NIXPKGS_ALLOW_UNFREE = "1";
-  nix = {
-    package = pkgs.nixFlakes;
-    extraOptions = "experimental-features = nix-command flakes";
-    nixPath = (mapAttrsToList (n: v: "${n}=${v}") inputs) ++ [
-      "nixpkgs-overlays=${dotFilesDir}/overlays"
-      "dotfiles=${dotFilesDir}"
-    ];
-    binaryCaches = [
-      "https://nix-community.cachix.org"
-    ];
-    binaryCachePublicKeys = [
-      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-    ];
-    registry = {
-      nixos.flake = nixpkgs;
-      nixpkgs.flake = nixpkgs-unstable;
+  nix =
+    let filteredInputs = filterAttrs (n: _: n != "self") inputs;
+        nixPathInputs  = mapAttrsToList (n: v: "${n}=${v}") filteredInputs;
+        registryInputs = mapAttrs (_: v: { flake = v; }) filteredInputs;
+    in {
+      package = pkgs.nixFlakes;
+      extraOptions = "experimental-features = nix-command flakes";
+      nixPath = nixPathInputs ++ [
+        "nixpkgs-overlays=${dotFilesDir}/overlays"
+        "dotfiles=${dotFilesDir}"
+      ];
+      binaryCaches = [
+        "https://nix-community.cachix.org"
+      ];
+      binaryCachePublicKeys = [
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
+      registry = registryInputs // { dotfiles.flake = inputs.self; };
+      useSandbox = true;
     };
-    useSandbox = true;
-  };
-  system.configurationRevision = mkIf (self ? rev) self.rev;
+  system.configurationRevision = with inputs; mkIf (self ? rev) self.rev;
   system.stateVersion = "20.09";
 
 

flake.nix

@@ -59,7 +59,7 @@
         { dotfiles = import ./.; } // mapModulesRec ./modules import;
 
       nixosConfigurations =
-        mapHosts ./hosts { inherit system; };
+        mapHosts ./hosts {};
 
       devShell."${system}" =
         import ./shell.nix { inherit pkgs; };

lib/nixos.nix

@@ -2,12 +2,12 @@
 
 with lib;
 with lib.my;
-let system = "x86_64-linux";
+let sys = "x86_64-linux";
 in {
-  mkHost = path: attrs @ { system ? system, ... }:
+  mkHost = path: attrs @ { system ? sys, ... }:
     nixosSystem {
       inherit system;
-      specialArgs = { inherit lib inputs; };
+      specialArgs = { inherit lib inputs system; };
       modules = [
         {
           nixpkgs.pkgs = pkgs;

lib/paths.nix

@@ -9,7 +9,4 @@ rec {
   configDir   = "${dotFilesDir}/config";
   binDir      = "${dotFilesDir}/bin";
   themesDir   = "${modulesDir}/themes";
-  homeDir = "/home/${let name = getEnv "USERNAME"; in
-                     if elem name [ "" "root" ]
-                     then "hlissner" else name}";
 }

modules/desktop/browsers/firefox.nix

@@ -47,7 +47,7 @@ in {
         # Enable userContent.css and userChrome.css for our theme modules
         "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
         # Stop creating ~/Downloads!
-        "browser.download.dir" = "${homeDir}/dl";
+        "browser.download.dir" = "${config.user.home}/dl";
         # Don't use the built-in password manager; a nixos user is more likely
         # using an external one (you are using one, right?).
         "signon.rememberSignons" = false;

modules/desktop/default.nix

@@ -113,7 +113,7 @@ in {
 
     # Clean up leftovers, as much as we can
     system.userActivationScripts.cleanupHome = ''
-      pushd "${homeDir}"
+      pushd "${config.user.home}"
       rm -rf .compose-cache .nv .pki .dbus .fehbg
       [ -s .xsession-errors ] || rm -f .xsession-errors*
       popd

modules/options.nix

@@ -24,15 +24,17 @@ with lib.my;
   };
 
   config = {
-    user = {
-      description = "The primary user account";
-      extraGroups = [ "wheel" ];
-      isNormalUser = true;
-      name = let name = builtins.getEnv "USER"; in
-             if elem name [ "" "root" ]
-             then "hlissner" else name;
-      uid = 1000;
-    };
+    user =
+      let user = builtins.getEnv "USER";
+          name = if elem user [ "" "root" ] then "hlissner" else user;
+      in {
+        inherit name;
+        description = "The primary user account";
+        extraGroups = [ "wheel" ];
+        isNormalUser = true;
+        home = "/home/${name}";
+        uid = 1000;
+      };
 
     # Install user packages to /etc/profiles instead. Necessary for
     # nixos-rebuild build-vm to work.

modules/services/transmission.nix

@@ -11,7 +11,7 @@ in {
   config = mkIf cfg.enable {
     services.transmission = {
       enable = true;
-      home = "${homeDir}/torrents";
+      home = "${config.user.home}/torrents";
       settings = {
         incomplete-dir-enabled = true;
         rpc-whitelist = "127.0.0.1,192.168.*.*";