diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 455b2ddbff3b..0f92662de661 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12494,6 +12494,7 @@ self: super: with self; {
     inherit (pkgs) fontconfig rapidjson;
     inherit (pkgs.xorg) libX11 libXi libXmu libXext;
     inherit (pkgs.darwin.apple_sdk.frameworks) Cocoa;
+    opencascade-occt = pkgs.opencascade-occt_7_6;
   });
 
   python-olm = callPackage ../development/python-modules/python-olm { };