2 files changed, 52 insertions, 42 deletions

diff --git a/modules/by-name/ni/nix/module.nix b/modules/by-name/ni/nix/module.nix
index ed4462f4..65b6ed5c 100644
--- a/modules/by-name/ni/nix/module.nix
+++ b/modules/by-name/ni/nix/module.nix
@@ -9,63 +9,71 @@
 # If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   pkgs,
+  libraries,
+  config,
+  lib,
   # flakes
   sources,
   self,
   system,
   externalDependencies,
   ...
-}:
-let
+}: let
   nixpkgs = sources.loadFlake "nixpkgs";
+
+  cfg = config.soispha.nix;
 in {
-  # TODO(@bpeetz): Modularize <2025-02-08>
+  options.soispha.nix = {
+    enable = libraries.base.options.mkEnable "nix";
+  };
 
-  nix = {
-    package = pkgs.lixPackageSets.latest.lix;
+  config = lib.mkIf cfg.enable {
+    nix = {
+      package = pkgs.lixPackageSets.latest.lix;
 
-    # Disable nix channels  (this is a remnant of old days)
-    channel.enable = false;
+      # Disable nix channels  (this is a remnant of old days)
+      channel.enable = false;
 
-    registry = {
-      nixpkgs.flake = nixpkgs;
-      n.flake =
-        nixpkgs
-        // {
-          # Otherwise nixpkgs's config and overlays are not available:
+      registry = {
+        nixpkgs.flake = nixpkgs;
+        n.flake =
+          nixpkgs
+          // {
+            # Otherwise nixpkgs's config and overlays are not available:
 
-          # Both attrs exists, so we just override both and hope
-          outputs.legacyPackages."${system}" = pkgs;
-          legacyPackages."${system}" = pkgs;
-        };
+            # Both attrs exists, so we just override both and hope
+            outputs.legacyPackages."${system}" = pkgs;
+            legacyPackages."${system}" = pkgs;
+          };
 
-      t.flake = externalDependencies.templates;
+        t.flake = externalDependencies.templates;
 
-      my_flake.flake = self;
-      m.flake = self;
-    };
+        my_flake.flake = self;
+        m.flake = self;
+      };
 
-    gc = {
-      automatic = true;
-      dates = "weekly";
-      options = "--delete-older-than 7d";
-    };
+      gc = {
+        automatic = true;
+        dates = "weekly";
+        options = "--delete-older-than 7d";
+      };
 
-    settings = {
-      auto-optimise-store = true;
-      experimental-features = [
-        "nix-command"
-        "flakes"
-      ];
+      settings = {
+        auto-optimise-store = true;
+        experimental-features = [
+          "nix-command"
+          "flakes"
+        ];
 
-      use-xdg-base-directories = true;
+        use-xdg-base-directories = true;
 
-      fallback = true; # Build from source, if binary can't be substituted
+        fallback = true; # Build from source, if binary can't be substituted
 
-      keep-failed = false; # keep failed tmp build dirs
-      pure-eval = true; # restrict file system and network access to hash
+        keep-failed = false; # keep failed tmp build dirs
+        pure-eval = true; # restrict file system and network access to hash
 
-      sandbox-fallback = false; # Don't disable the sandbox, if the kernel doesn't support it
+        sandbox-fallback = false; # Don't disable the sandbox, if the kernel doesn't support it
+      };
     };
   };
 }
diff --git a/modules/by-name/ni/nixpkgs/module.nix b/modules/by-name/ni/nixpkgs/module.nix
index 84d8e074..1ded8444 100644
--- a/modules/by-name/ni/nixpkgs/module.nix
+++ b/modules/by-name/ni/nixpkgs/module.nix
@@ -22,7 +22,13 @@ in {
       example = "x86_64-linux";
       type = lib.types.str;
     };
+    unfreePackageNames = lib.mkOption {
+      description = "Names of unfree packages to allow";
+      example = "[ steam steam-unwrapped ]";
+      type = lib.types.listOf lib.types.str;
+    };
   };
+
   config = let
     myPkgsOverlay = self: super: packageSets.soispha;
   in
@@ -39,11 +45,7 @@ in {
           hostSystem = cfg.systemName;
 
           allowUnfreePredicate = pkg:
-            builtins.elem (lib.getName pkg) [
-              # the plugin is lacking an license and is thus unfree, effectively
-              # its okay though (TODO: investigate <2026-05-11>)?
-              "cmp-calc"
-            ];
+            builtins.elem (lib.getName pkg) cfg.unfreePackageNames;
         };
       };
     };