diff --git a/pkgs/development/python-modules/ray/default.nix b/pkgs/development/python-modules/ray/default.nix
index 7e72996bd9dd9..7af71b0ccbf2d 100644
--- a/pkgs/development/python-modules/ray/default.nix
+++ b/pkgs/development/python-modules/ray/default.nix
@@ -87,7 +87,7 @@ buildPythonPackage rec {
       python = pyShortVersion;
       abi = pyShortVersion;
       platform = "manylinux2014_x86_64";
-      hash = binary-hashes.${pyShortVersion};
+      hash = binary-hashes.${pyShortVersion} or { };
     };
 
   nativeBuildInputs = [