environment.path: add support for nix profile

CHANGELOG.md

@@ -10,6 +10,7 @@
 * Refactored project for flakes usage (still supporting non-flake setups on
   device, but bootstrap zip ball creation and running tests via fakedroid
   requires flake setup)
+* Add support for `nix profile` managed profiles
 
 ## Release 22.05
 

README.md

@@ -161,9 +161,6 @@ you shouldn't need a binary cache for that.
 
 **Note:** Nix flake support is still experimental at the moment and subject to change.
 
-Do not run `nix profile` because this will render your environment incompatible with `nix-on-droid` as it relies on
-`nix-env`.
-
 ### Examples / templates
 
 A minimal example could look like the following:

modules/environment/path.nix

@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2021, see AUTHORS. Licensed under MIT License, see LICENSE.
+# Copyright (c) 2019-2022, see AUTHORS. Licensed under MIT License, see LICENSE.
 
 { config, lib, pkgs, ... }:
 
@@ -37,7 +37,11 @@ in
   config = {
 
     build.activation.installPackages = ''
-      $DRY_RUN_CMD nix-env --install ${cfg.path}
+      if [[ -e "${config.user.home}/.nix-profile/manifest.json" ]]; then
+        $DRY_RUN_CMD nix profile install ${cfg.path}
+      else
+        $DRY_RUN_CMD nix-env --install ${cfg.path}
+      fi
     '';
 
     environment = {