diff --git a/pkgs/development/libraries/opencascade-occt/7.3.nix b/pkgs/development/libraries/opencascade-occt/7.3.nix
deleted file mode 100644
index 5f8302aff3c..00000000000
--- a/pkgs/development/libraries/opencascade-occt/7.3.nix
+++ /dev/null
@@ -1,29 +0,0 @@
-{ stdenv, fetchurl, fetchpatch, cmake, ninja, tcl, tk,
-  libGL, libGLU, libXext, libXmu, libXi, darwin }:
-
-stdenv.mkDerivation rec {
-  pname = "opencascade-occt";
-  version = "7.3.0p3";
-  commit = "V${builtins.replaceStrings ["."] ["_"] version}";
-
-  src = fetchurl {
-    name = "occt-${commit}.tar.gz";
-    url = "https://git.dev.opencascade.org/gitweb/?p=occt.git;a=snapshot;h=${commit};sf=tgz";
-    sha256 = "0k9c3ypcnjcilq1dhsf6xxbd52gyq4h5rchvp30k3c8ph4ris5pz";
-  };
-
-  nativeBuildInputs = [ cmake ninja ];
-  buildInputs = [ tcl tk libGL libGLU libXext libXmu libXi ]
-    ++ stdenv.lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Cocoa;
-
-  meta = with stdenv.lib; {
-    description = "Open CASCADE Technology, libraries for 3D modeling and numerical simulation";
-    homepage = "https://www.opencascade.org/";
-    license = licenses.lgpl21;  # essentially...
-    # The special exception defined in the file OCCT_LGPL_EXCEPTION.txt
-    # are basically about making the license a little less share-alike.
-    maintainers = with maintainers; [ amiloradovsky ];
-    platforms = platforms.all;
-  };
-
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fa45539595b..8d33489e0a9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14707,7 +14707,6 @@ in
     inherit (darwin.apple_sdk.frameworks) OpenCL Cocoa;
   };
   opencascade-occt = callPackage ../development/libraries/opencascade-occt { };
-  opencascade-occt730 = callPackage ../development/libraries/opencascade-occt/7.3.nix { };
 
   opencl-headers = callPackage ../development/libraries/opencl-headers { };