diff --git a/pkgs/applications/science/electronics/horizon-eda/default.nix b/pkgs/applications/science/electronics/horizon-eda/default.nix
index fb9f226cf39e..fa2f68b82adc 100644
--- a/pkgs/applications/science/electronics/horizon-eda/default.nix
+++ b/pkgs/applications/science/electronics/horizon-eda/default.nix
@@ -13,7 +13,7 @@
 , librsvg
 , libspnav
 , libuuid
-, opencascade
+, opencascade-occt
 , pkg-config
 , podofo
 , python3
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     librsvg
     libspnav
     libuuid
-    opencascade
+    opencascade-occt
     podofo
     python3
     sqlite
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     wrapGAppsHook
   ];
 
-  CASROOT = opencascade;
+  CASROOT = opencascade-occt;
 
   installFlags = [
     "INSTALL=${coreutils}/bin/install"