diff --git a/modules/kernels/coq/module.nix b/modules/kernels/coq/module.nix
index ccd0451..6671e93 100644
--- a/modules/kernels/coq/module.nix
+++ b/modules/kernels/coq/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,7 +16,9 @@ with lib;
         example = "List of Coq packages to use";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
+
       coqPackages = mkOption {
         example = "Coq packages set";
         type = types.enum (
diff --git a/modules/kernels/cpp/module.nix b/modules/kernels/cpp/module.nix
index e0f5327..17a9030 100644
--- a/modules/kernels/cpp/module.nix
+++ b/modules/kernels/cpp/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,6 +16,7 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       flavor = mkOption {
diff --git a/modules/kernels/go/module.nix b/modules/kernels/go/module.nix
index 1ea1043..a804f05 100644
--- a/modules/kernels/go/module.nix
+++ b/modules/kernels/go/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,6 +16,7 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       goPackage = mkOption {
diff --git a/modules/kernels/haskell/module.nix b/modules/kernels/haskell/module.nix
index 1f90d9d..da12152 100644
--- a/modules/kernels/haskell/module.nix
+++ b/modules/kernels/haskell/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,7 +16,9 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
+
       ghcPackage = mkOption {
         example = "GHC version";
         type = types.enum ["ghc92" "ghc94" "ghc96" "ghc98"];
diff --git a/modules/kernels/julia/module.nix b/modules/kernels/julia/module.nix
index d8a744f..ac5f282 100644
--- a/modules/kernels/julia/module.nix
+++ b/modules/kernels/julia/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,6 +16,7 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       juliaPackage = mkOption {
diff --git a/modules/kernels/octave/module.nix b/modules/kernels/octave/module.nix
index df3cf77..8ec29a7 100644
--- a/modules/kernels/octave/module.nix
+++ b/modules/kernels/octave/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,6 +16,7 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       interface.attrs = mkOption {
diff --git a/modules/kernels/postgres/module.nix b/modules/kernels/postgres/module.nix
index 6d03d73..0473435 100644
--- a/modules/kernels/postgres/module.nix
+++ b/modules/kernels/postgres/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -15,6 +15,7 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       interface.attrs = mkOption {
diff --git a/modules/kernels/python/module.nix b/modules/kernels/python/module.nix
index 3173cf7..9954093 100644
--- a/modules/kernels/python/module.nix
+++ b/modules/kernels/python/module.nix
@@ -13,8 +13,20 @@ let
 
     packages = mkOption {
       example = "List of packages";
-      type = types.listOf types.str;
+      type = types.listOf (types.either types.str (types.submodule {
+        options = {
+          name = mkOption {
+            description = "Package name";
+            type = types.str;
+          };
+          outputs = mkOption {
+            example = "Package outputs to include";
+            type = types.listOf types.str;
+          };
+        };
+      }));
       default = [];
+      visible = false;
     };
 
     python3Package = packageOption;
diff --git a/modules/kernels/r/module.nix b/modules/kernels/r/module.nix
index 988f4cd..2285ec1 100644
--- a/modules/kernels/r/module.nix
+++ b/modules/kernels/r/module.nix
@@ -1,4 +1,4 @@
-{ config, options, lib, pkgs, nixosOptionsToSettingsSchema, boilerplate, ... }:
+{ config, options, lib, nixosOptionsToSettingsSchema, boilerplate, ... }:
 
 with lib;
 
@@ -16,6 +16,7 @@ with lib;
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       interface.attrs = mkOption {
diff --git a/modules/kernels/ruby/module.nix b/modules/kernels/ruby/module.nix
index 1a42d39..49aa367 100644
--- a/modules/kernels/ruby/module.nix
+++ b/modules/kernels/ruby/module.nix
@@ -21,6 +21,7 @@ in
         example = "List of packages";
         type = types.listOf types.str;
         default = [];
+        visible = false;
       };
 
       rubyPackage = mkOption {
diff --git a/modules/kernels/rust/module.nix b/modules/kernels/rust/module.nix
index cef65b4..bac84e7 100644
--- a/modules/kernels/rust/module.nix
+++ b/modules/kernels/rust/module.nix
@@ -16,11 +16,11 @@ with lib;
         example = "List of packages";
         type = types.listOf (types.either types.str (types.submodule {
           options = {
-            name = mkOption rec {
+            name = mkOption {
               description = "Package name";
               type = types.str;
             };
-            features = mkOption rec {
+            features = mkOption {
               example = "Features to enable for the package";
               type = types.listOf types.str;
             };
diff --git a/nix/makeEnvironment.nix b/nix/makeEnvironment.nix
index 4561470..ba1668e 100644
--- a/nix/makeEnvironment.nix
+++ b/nix/makeEnvironment.nix
@@ -43,15 +43,19 @@ let
 
     mkSubPackageMetadata = pkg: p: {
       name = packageName p;
-      meta = if lib.hasAttrByPath ["packageOptions" (packageName p)] pkg then chooseMeta (pkg.packageOptions.${packageName p}) else {};
-    } // (lib.optionalAttrs (lib.isAttrs p && p ? "settings") {
-      inherit (p) settings;
-    });
+      meta = let
+        meta = chooseMeta (pkg.packageOptions.${packageName p} or {});
+        settings = if lib.isAttrs p then lib.removeAttrs p ["name"] else {};
+      in
+        meta // (lib.optionalAttrs (builtins.length (builtins.attrNames settings) != 0) {
+          inherit settings;
+        });
+    };
   in
     pkg: {
       # Dry
       name = pkg.name;
-      settings = pkg.settings or {};
+      settings = lib.removeAttrs (pkg.settings or {}) ["packages"];
 
       # Different for hydrated
       packages = map (p: mkSubPackageMetadata pkg p) (pkg.settings.packages or []);
diff --git a/sample_environments/python3.nix b/sample_environments/python3.nix
index 8bb304a..889d834 100644
--- a/sample_environments/python3.nix
+++ b/sample_environments/python3.nix
@@ -5,7 +5,10 @@
 codedown.makeEnvironment {
   kernels.python3.enable = true;
   kernels.python3.packages = [
-    "matplotlib"
+    {
+      name = "matplotlib";
+      outputs = ["out" "dist"];
+    }
     "scipy"
     "rope"
   ];