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-rw-r--r--nixpkgs/pkgs/development/python-modules/zarr/default.nix3
1 files changed, 2 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/zarr/default.nix b/nixpkgs/pkgs/development/python-modules/zarr/default.nix
index 78610073af01..8be14e23e7d0 100644
--- a/nixpkgs/pkgs/development/python-modules/zarr/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/zarr/default.nix
@@ -4,6 +4,7 @@
 , fasteners
 , fetchPypi
 , numcodecs
+, msgpack
 , numpy
 , pytestCheckHook
 , pythonOlder
@@ -31,7 +32,7 @@ buildPythonPackage rec {
     numpy
     fasteners
     numcodecs
-  ];
+  ] ++ numcodecs.optional-dependencies.msgpack;
 
   nativeCheckInputs = [
     pytestCheckHook