From 7ae106ff770140090ca55e46edd93ca5475cbee6 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Thu, 5 Mar 2026 09:01:23 +0000
Subject: [PATCH] pypy3Packages.zarr.optional-dependencies: fix the eval
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Without the chnage the eval fails as:

    $ nix-instantiate -A pypy3Packages.zarr.optional-dependencies
    error:
       … while evaluating the attribute 'docs'
         at pkgs/development/python-modules/zarr/default.nix:126:7:
          125|       ];
          126|       docs = [
             |       ^
          127|         # Doc building

       … while selecting an attribute
         at pkgs/development/python-modules/zarr/default.nix:145:10:
          144|       ++ mkdocs-material.optional-dependencies.imaging
          145|       ++ markdown-exec.optional-dependencies.ansi
             |          ^
          146|       ++ numcodecs.optional-dependencies.msgpack;

       error: expected a set but found null: null
---
 pkgs/development/python-modules/zarr/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/zarr/default.nix b/pkgs/development/python-modules/zarr/default.nix
index b7f738c1d92c..0fe4d1b04da4 100644
--- a/pkgs/development/python-modules/zarr/default.nix
+++ b/pkgs/development/python-modules/zarr/default.nix
@@ -142,7 +142,7 @@ buildPythonPackage (finalAttrs: {
         #pytest
       ]
       ++ mkdocs-material.optional-dependencies.imaging
-      ++ markdown-exec.optional-dependencies.ansi
+      ++ lib.optionals (markdown-exec != null) markdown-exec.optional-dependencies.ansi
       ++ numcodecs.optional-dependencies.msgpack;
     };
   };