--- CMakeLists.txt.orig	2026-05-06 22:31:54 UTC
+++ CMakeLists.txt
@@ -977,6 +977,8 @@ OCCT_INCLUDE_CMAKE_FILE ("adm/cmake/occt_defs_flags")
 # include original list of definitions and flags
 OCCT_INCLUDE_CMAKE_FILE ("adm/cmake/occt_defs_flags")
 
+include(adm/cmake/vtk.cmake) # workaround for https://gitlab.kitware.com/vtk/vtk/-/issues/19716
+
 foreach (OCCT_3RDPARTY_LIST ${OCCT_3RDPARTY_CMAKE_LIST})
   OCCT_INCLUDE_CMAKE_FILE (${OCCT_3RDPARTY_LIST})
 endforeach()
@@ -1143,7 +1145,7 @@ endif()
 endif()
 
 # validating custom.bat/sh for changes
-if (EXISTS "${CMAKE_BINARY_DIR}/custom.${SCRIPT_EXT}" AND EXISTS "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}")
+if (FALSE)
   file (READ "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" CUSTOM_CONTENT)
   string(FIND "${CUSTOM_CONTENT}" "${ADDITIONAL_CUSTOM_CONTENT}" pos)
   if (pos EQUAL -1)
@@ -1219,13 +1221,13 @@ else()
     set \"CSF_OCCTTestsPath=%CASROOT%/${INSTALL_DIR_TESTS}\"
     set \"CSF_OCCTDocPath=%CASROOT%/${INSTALL_DIR_DOC}\"")
   else()
-    set (OCCT_CUSTOM_BIN_LIB_PATHS "export CSF_OCCTBinPath=\"\${CASROOT}/${INSTALL_DIR_BIN}\"
-    export CSF_OCCTLibPath=\"\${CASROOT}/${INSTALL_DIR_LIB}\"")
-    set (OCCT_CUSTOM_ADDITIONAL_PATHS "export CSF_OCCTIncludePath=\"\${CASROOT}/${INSTALL_DIR_INCLUDE}\"
-    export CSF_OCCTResourcePath=\"\${CASROOT}/${INSTALL_DIR_RESOURCE}\"
-    export CSF_OCCTDataPath=\"\${CASROOT}/${INSTALL_DIR_DATA}\"
-    export CSF_OCCTTestsPath=\"\${CASROOT}/${INSTALL_DIR_TESTS}\"
-    export CSF_OCCTDocPath=\"\${CASROOT}/${INSTALL_DIR_DOC}\"")
+    set (OCCT_CUSTOM_BIN_LIB_PATHS "export CSF_OCCTBinPath=\"\${INSTALL_DIR_BIN}\"
+    export CSF_OCCTLibPath=\"\${INSTALL_DIR_LIB}\"")
+    set (OCCT_CUSTOM_ADDITIONAL_PATHS "export CSF_OCCTIncludePath=\"\${INSTALL_DIR_INCLUDE}\"
+    export CSF_OCCTResourcePath=\"\${INSTALL_DIR_RESOURCE}\"
+    export CSF_OCCTDataPath=\"\${INSTALL_DIR_DATA}\"
+    export CSF_OCCTTestsPath=\"\${INSTALL_DIR_TESTS}\"
+    export CSF_OCCTDocPath=\"\${INSTALL_DIR_DOC}\"")
   endif()
 endif()
 
@@ -1427,7 +1429,7 @@ install (CODE "string (TOLOWER \"\${CMAKE_INSTALL_CONF
 endforeach()
 # install OpenCASCADE config file with compile definitions and C/C++ flags ONLY for current configuration
 install (CODE "string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWER)")
-install (CODE "file(INSTALL FILES \"${CMAKE_BINARY_DIR}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" DESTINATION \"${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/\" TYPE FILE)")
+install (CODE "file(INSTALL FILES \"${CMAKE_BINARY_DIR}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" DESTINATION \"${INSTALL_DIR_CMAKE}/\" TYPE FILE)")
 
 foreach (OCCT_MODULE ${OCCT_MODULES})
   if (BUILD_MODULE_${OCCT_MODULE})