diff --git a/README.md b/README.md
index da540e5..f3c0fea 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # opencascade
 
+Open CASCADE Technology (OCCT) full-scale 3D geometry library.
+
diff --git a/occt-7.6.2-cmake-fix2.patch b/occt-7.6.2-cmake-fix2.patch
new file mode 100644
index 0000000..73cfd72
--- /dev/null
+++ b/occt-7.6.2-cmake-fix2.patch
@@ -0,0 +1,18 @@
+--- occt-7.6.0/CMakeLists.txt.orig	2022-06-02 15:37:32.868338814 +0200
++++ occt-7.6.0/CMakeLists.txt	2022-06-02 15:37:42.915275211 +0200
+@@ -979,12 +979,12 @@
+ endif()
+ 
+  # change custom.bat/sh
+-if (EXISTS "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}")
+-  file (READ "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" CUSTOM_CONTENT)
++if (EXISTS "${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}")
++  file (READ "${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" CUSTOM_CONTENT)
+ 
+   set (CUSTOM_CONTENT "${CUSTOM_CONTENT} ${ADDITIONAL_CUSTOM_CONTENT}")
+ 
+-  file (WRITE "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" "${CUSTOM_CONTENT}")
++  file (WRITE "${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" "${CUSTOM_CONTENT}")
+ else()
+   OCCT_CONFIGURE_AND_INSTALL ("adm/templates/custom.${SCRIPT_EXT}.main" "custom.${SCRIPT_EXT}" "custom.${SCRIPT_EXT}" "${INSTALL_DIR_SCRIPT}")
+ endif()
diff --git a/occt-7.8.1-cmake-install.patch b/occt-7.8.1-cmake-install.patch
new file mode 100644
index 0000000..bf6f1b2
--- /dev/null
+++ b/occt-7.8.1-cmake-install.patch
@@ -0,0 +1,11 @@
+--- occt-7.8.1/adm/cmake/occt_macros.cmake.orig	2024-05-15 18:36:35.231032184 +0200
++++ occt-7.8.1/adm/cmake/occt_macros.cmake	2024-05-15 19:12:39.169620421 +0200
+@@ -592,7 +592,7 @@
+ 
+   install (CODE
+   "string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWERCASE)
+-  file (GLOB ALL_OCCT_TARGET_FILES \"${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/OpenCASCADE*Targets-\${CMAKE_INSTALL_CONFIG_NAME_LOWERCASE}.cmake\")
++  file (GLOB ALL_OCCT_TARGET_FILES \"$ENV{DESTDIR}${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/OpenCASCADE*Targets-\${CMAKE_INSTALL_CONFIG_NAME_LOWERCASE}.cmake\")
+   foreach(TARGET_FILENAME \${ALL_OCCT_TARGET_FILES})
+     file (STRINGS \"\${TARGET_FILENAME}\" TARGET_FILE_CONTENT)
+     file (REMOVE \"\${TARGET_FILENAME}\")
diff --git a/occt-7.8.1-tbb-2021.12.0.patch b/occt-7.8.1-tbb-2021.12.0.patch
new file mode 100644
index 0000000..9e9c66a
--- /dev/null
+++ b/occt-7.8.1-tbb-2021.12.0.patch
@@ -0,0 +1,58 @@
+Index: occt-V7_8_0/CMakeLists.txt
+===================================================================
+--- occt-V7_8_0.orig/CMakeLists.txt
++++ occt-V7_8_0/CMakeLists.txt
+@@ -739,7 +739,8 @@ endif()
+ if (NOT DEFINED ANDROID AND CAN_USE_TBB)
+   if (USE_TBB)
+     add_definitions (-DHAVE_TBB)
+-    OCCT_INCLUDE_CMAKE_FILE ("adm/cmake/tbb")
++    #OCCT_INCLUDE_CMAKE_FILE ("adm/cmake/tbb")
++	find_package(TBB CONFIG REQUIRED)
+   else()
+     OCCT_CHECK_AND_UNSET_GROUP ("3RDPARTY_TBB")
+     OCCT_CHECK_AND_UNSET_GROUP ("3RDPARTY_TBBMALLOC")
+Index: occt-V7_8_0/adm/templates/OpenCASCADEConfig.cmake.in
+===================================================================
+--- occt-V7_8_0.orig/adm/templates/OpenCASCADEConfig.cmake.in
++++ occt-V7_8_0/adm/templates/OpenCASCADEConfig.cmake.in
+@@ -27,7 +27,7 @@ get_filename_component (OpenCASCADE_INST
+ if (OpenCASCADE_INSTALL_PREFIX MATCHES "/cmake$")
+   get_filename_component (OpenCASCADE_INSTALL_PREFIX "${OpenCASCADE_INSTALL_PREFIX}" PATH)
+ endif()
+-if (OpenCASCADE_INSTALL_PREFIX MATCHES "/lib$")
++if (OpenCASCADE_INSTALL_PREFIX MATCHES "/lib$" OR OpenCASCADE_INSTALL_PREFIX MATCHES "/lib64$")
+   get_filename_component (OpenCASCADE_INSTALL_PREFIX "${OpenCASCADE_INSTALL_PREFIX}" PATH)
+ endif()
+ if (OpenCASCADE_INSTALL_PREFIX MATCHES "/libs/${CMAKE_ANDROID_ARCH_ABI}$")
+Index: occt-V7_8_0/adm/cmake/tbb.cmake
+===================================================================
+--- occt-V7_8_0.orig/adm/cmake/tbb.cmake
++++ occt-V7_8_0/adm/cmake/tbb.cmake
+@@ -153,21 +153,21 @@ else ()
+     if ((NOT "${3RDPARTY_TBB_DIR}" STREQUAL "") AND (EXISTS "${3RDPARTY_TBB_DIR}"))
+       # Find TBB 2021.5 in existing directory.
+       find_package (
+-      TBB 2021.5
++      TBB
+       PATHS "${3RDPARTY_TBB_DIR}" NO_DEFAULT_PATH
+       REQUIRED
+       CONFIG)
+     else()
+-      # Find TBB 2021.5 in system directory.
++      # Find TBB 2021 in system directory.
+       find_package (
+-      TBB 2021.5
++      TBB
+       REQUIRED
+       CONFIG)
+     endif()
+   else()
+-    # Find TBB 2021.5 in system directory.
++    # Find TBB 2021 in system directory.
+     find_package (
+-    TBB 2021.5
++    TBB
+     REQUIRED
+     CONFIG)
+   endif()
diff --git a/occt-7.8.1-vtk-7.3.1.patch b/occt-7.8.1-vtk-7.3.1.patch
new file mode 100644
index 0000000..9e99d06
--- /dev/null
+++ b/occt-7.8.1-vtk-7.3.1.patch
@@ -0,0 +1,113 @@
+Index: occt-V7_7_2/src/IVtkDraw/IVtkDraw.cxx
+===================================================================
+--- occt-V7_7_2.orig/src/IVtkDraw/IVtkDraw.cxx
++++ occt-V7_7_2/src/IVtkDraw/IVtkDraw.cxx
+@@ -31,10 +31,8 @@
+ #include <NCollection_List.hxx>
+ #include <NCollection_DataMap.hxx>
+ #include <TopTools_DataMapOfIntegerShape.hxx>
+-#include <OpenGl_GraphicDriver.hxx>
+ #include <V3d.hxx>
+ #include <V3d_TypeOfOrientation.hxx>
+-#include <Aspect_DisplayConnection.hxx>
+ 
+ #include <IVtk_Types.hxx>
+ #include <IVtkVTK_ShapeData.hxx>
+@@ -75,6 +73,9 @@
+ #include <vtkSmartPointer.h>
+ #include <vtkTIFFWriter.h>
+ #include <vtkWindowToImageFilter.h>
++// Move X11 including files after vtk
++#include <OpenGl_GraphicDriver.hxx>
++#include <Aspect_DisplayConnection.hxx>
+ #ifndef _WIN32
+   #include <X11/X.h>
+   #include <X11/Shell.h>
+Index: occt-V7_7_2/src/IVtkDraw/IVtkDraw_Interactor.hxx
+===================================================================
+--- occt-V7_7_2.orig/src/IVtkDraw/IVtkDraw_Interactor.hxx
++++ occt-V7_7_2/src/IVtkDraw/IVtkDraw_Interactor.hxx
+@@ -20,16 +20,6 @@
+ #include <Standard_Macro.hxx>
+ #include <Standard_Transient.hxx>
+ 
+-#ifdef _WIN32
+-#include <windows.h>
+-#else
+-#include <X11/X.h>
+-#include <X11/Xlib.h>
+-#include <X11/Shell.h>
+-#include <X11/Xutil.h>
+-#include <tk.h>
+-#endif
+-
+ // prevent disabling some MSVC warning messages by VTK headers 
+ #include <Standard_WarningsDisable.hxx>
+ #include <vtkRenderWindowInteractor.h>
+@@ -40,6 +30,17 @@
+ #include <IVtkDraw_HighlightAndSelectionPipeline.hxx>
+ #include <Aspect_Window.hxx>
+ 
++// Include X11 headers after VTK for 9.2
++#ifdef _WIN32
++#include <windows.h>
++#else
++#include <X11/X.h>
++#include <X11/Xlib.h>
++#include <X11/Shell.h>
++#include <X11/Xutil.h>
++#include <tk.h>
++#endif
++
+ class vtkWin32RenderWindowInteractor;
+ typedef vtkSmartPointer<IVtkTools_ShapePicker> PSelector;
+ 
+Index: occt-V7_7_2/src/IVtkDraw/IVtkDraw_Interactor.cxx
+===================================================================
+--- occt-V7_7_2.orig/src/IVtkDraw/IVtkDraw_Interactor.cxx
++++ occt-V7_7_2/src/IVtkDraw/IVtkDraw_Interactor.cxx
+@@ -15,17 +15,6 @@
+ 
+ // prevent disabling some MSVC warning messages by VTK headers 
+ #include <Standard_WarningsDisable.hxx>
+-#ifdef _WIN32
+-#include <vtkWin32RenderWindowInteractor.h>
+-#include <vtkWin32OpenGLRenderWindow.h>
+-#else
+-#include <GL/glx.h>
+-
+-// Preventing naming collisions between
+-// GLX and VTK versions 9.0 and above
+-#ifdef AllValues
+-#undef AllValues
+-#endif
+ 
+ // Resolve name collisions with X11 headers
+ #ifdef Status
+@@ -36,9 +25,6 @@
+ #undef Success
+ #endif
+ 
+-#include <vtkXRenderWindowInteractor.h>
+-#include <vtkXOpenGLRenderWindow.h>
+-#endif
+ #include <vtkActor.h>
+ #include <vtkActorCollection.h>
+ #include <vtkCommand.h>
+@@ -54,6 +40,16 @@
+ #include <IVtkTools_ShapeObject.hxx>
+ #include <IVtkTools_ShapeDataSource.hxx>
+ 
++// Include X11 headers after VTK for VTK 9.2.5
++#ifdef _WIN32
++#include <vtkWin32RenderWindowInteractor.h>
++#include <vtkWin32OpenGLRenderWindow.h>
++#else
++#include <GL/glx.h>
++#include <vtkXRenderWindowInteractor.h>
++#include <vtkXOpenGLRenderWindow.h>
++#endif
++
+ #include <Message.hxx>
+ #include <Message_Messenger.hxx>
+ 
diff --git a/opencascade-7.8.1-freetype-2.13.3.patch b/opencascade-7.8.1-freetype-2.13.3.patch
new file mode 100644
index 0000000..c37751f
--- /dev/null
+++ b/opencascade-7.8.1-freetype-2.13.3.patch
@@ -0,0 +1,11 @@
+--- occt-7.8.1/src/StdPrs/StdPrs_BRepFont.cxx.orig	2024-10-25 12:33:57.230234509 +0200
++++ occt-7.8.1/src/StdPrs/StdPrs_BRepFont.cxx	2024-10-25 12:34:41.493338095 +0200
+@@ -457,7 +457,7 @@
+   for (short aContour = 0, aStartIndex = 0; aContour < anOutline->n_contours; ++aContour)
+   {
+     const FT_Vector* aPntList = &anOutline->points[aStartIndex];
+-    const char* aTags      = &anOutline->tags[aStartIndex];
++    auto aTags      = &anOutline->tags[aStartIndex];
+     const short anEndIndex = anOutline->contours[aContour];
+     const short aPntsNb    = (anEndIndex - aStartIndex) + 1;
+     aStartIndex = anEndIndex + 1;
diff --git a/opencascade.spec b/opencascade.spec
new file mode 100644
index 0000000..7832656
--- /dev/null
+++ b/opencascade.spec
@@ -0,0 +1,166 @@
+%define gitver %(echo %version | tr . _)
+Name:          opencascade
+Version:       7.8.1
+Release:       2mamba
+Summary:       Open CASCADE Technology (OCCT) full-scale 3D geometry library
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://dev.opencascade.org/
+Source:        https://git.dev.opencascade.org/repos/occt.git/V%{gitver}/occt-%{version}.tar.bz2
+Patch1:        occt-7.6.2-cmake-fix2.patch
+Patch2:        occt-7.8.1-cmake-install.patch
+Patch3:        occt-7.8.1-tbb-2021.12.0.patch
+Patch4:        occt-7.8.1-vtk-7.3.1.patch
+Patch5:        opencascade-7.8.1-freetype-2.13.3.patch
+License:       GPL
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libX11-devel
+BuildRequires: libfontconfig-devel
+BuildRequires: libfreetype-devel
+BuildRequires: libgcc
+BuildRequires: libglew-devel
+BuildRequires: libglvnd-devel
+BuildRequires: libgomp-devel
+BuildRequires: libstdc++6-devel
+BuildRequires: libtbb-devel
+BuildRequires: libtcl-devel
+BuildRequires: libtk-devel
+BuildRequires: libvtk-devel
+## AUTOBUILDREQ-END
+BuildRequires: libvtk-devel >= 9.3.0-2mamba
+BuildRequires: cmake
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Provides:      oce
+Obsoletes:     oce <= 0.17.2
+Provides:      occt
+Obsoletes:     occt < 7.8.1-2mamba
+
+%description
+Open CASCADE Technology (OCCT) full-scale 3D geometry library.
+
+%package -n lib%{name}
+Group:         System/Libraries
+Summary:       Shared libraries for %{name}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
+Provides:      liboce
+Obsoletes:     liboce <= 0.17.2
+Provides:      libocct
+Obsoletes:     libocct < 7.8.1-2mamba
+
+%description -n lib%{name}
+This package contains shared libraries for %{name}.
+
+%package -n lib%{name}-devel
+Group:         Development/Libraries
+Summary:       Development files for %{name}
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Provides:      liboce-devel
+Obsoletes:     liboce-devel <= 0.17.2
+Provides:      libocct-devel
+Obsoletes:     libocct-devel < 7.8.1-2mamba
+
+%description -n lib%{name}-devel
+This package contains libraries and header files for developing applications that use %{name}.
+
+%debug_package
+
+%prep
+%setup -q -n occt-%{version}
+#-D -T
+#:<< _EOF
+%patch 1 -p1 -b .cmake-fix2
+%patch 2 -p1 -b .cmake-install
+%patch 3 -p1 -b .tbb-2021.12.0
+%patch 4 -p1 -b .vtk-7.3.1
+%patch 5 -p1 -b .freetype-2.13.3
+
+%build
+#:<< _EOF
+# cmake uses $ENV{DESTDIR} to create cmake_install file
+export DESTDIR=%{buildroot}
+
+%cmake -d build \
+   -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+   -DUSE_RAPIDJSON=True \
+   -DUSE_TBB=ON \
+   -D3RDPARTY_TBB_LIBRARY_DIR=%{_libdir} \
+   -D3RDPARTY_TBB_INCLUDE_DIR=%{_includedir} \
+   -DUSE_VTK=ON \
+   -DINSTALL_VTK=OFF \
+   -D3RDPARTY_VTK_LIBRARY_DIR=%{_libdir} \
+   -D3RDPARTY_VTK_INCLUDE_DIR=%{_includedir}/vtk \
+   -DINSTALL_DIR_LIB=%{_lib} \
+   -DINSTALL_DIR_CMAKE=%{_lib}/cmake/opencascade \
+   -Wno-dev
+
+%make
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%makeinstall -C build
+
+# Draw binary should not be versioned.
+mv %{buildroot}%{_bindir}/DRAWEXE-* \
+   %{buildroot}%{_bindir}/DRAWEXE
+
+# Remove license files so they can be included by %%license
+rm -rf %{buildroot}%{_datadir}/doc/opencascade
+
+# Fix non-executable shell scripts
+chmod 0755 %{buildroot}%{_bindir}/*.sh
+	
+# Fix library target manipulation attempt by upstream	
+sed -i "s/\\\\\${OCCT_INSTALL_BIN_LETTER}//g" %{buildroot}%{_libdir}/cmake/opencascade/*.cmake
+ 
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%post -n lib%{name} -p /sbin/ldconfig
+%postun -n lib%{name} -p /sbin/ldconfig
+
+%files
+%defattr(-,root,root)
+%{_bindir}/DRAWEXE*
+%{_bindir}/ExpToCasExe*
+%dir %{_datadir}/opencascade
+%dir %{_datadir}/opencascade/data
+%{_datadir}/opencascade/data/*
+%dir %{_datadir}/opencascade/resources
+%{_datadir}/opencascade/resources/*
+%dir %{_datadir}/opencascade/samples
+%{_datadir}/opencascade/samples/*
+
+%files -n lib%{name}
+%defattr(-,root,root)
+%{_libdir}/libTK*.so.*	
+%license LICENSE_LGPL_21.txt OCCT_LGPL_EXCEPTION.txt
+
+%files -n lib%{name}-devel
+%defattr(-,root,root)
+%{_bindir}/*.sh
+%dir %{_includedir}/opencascade/
+%{_includedir}/opencascade/*
+%{_libdir}/libTK*.so
+%dir %{_libdir}/cmake/opencascade
+%{_libdir}/cmake/opencascade/OpenCASCADE*.cmake
+%doc README.txt
+
+%changelog
+* Fri Oct 25 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 7.8.1-2mamba
+- sync some packaging changes from Fedora
+- renamed from occt to opencascade
+
+* Wed May 15 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 7.8.1-1mamba
+- update to 7.8.1
+
+* Sun Jul 31 2022 Automatic Build System <autodist@mambasoft.it> 7.6.3-1mamba
+- automatic version update by autodist
+
+* Wed Jun 01 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 7.6.2-1mamba
+- update to 7.6.2
+
+* Sun Jan 23 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 7.6.0-1mamba
+- package created using the webbuild interface