Index: occt-V7_6_3/CMakeLists.txt
===================================================================
--- occt-V7_6_3.orig/CMakeLists.txt
+++ occt-V7_6_3/CMakeLists.txt
@@ -1231,6 +1231,7 @@ foreach (OCCT_CONFIGURATION ${CMAKE_CONF
 endforeach()
 # install OpenCASCADE config file with compile definitions and C/C++ flags ONLY for current configuration
 install (CODE "string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWER)")
+set(INSTALL_DIR "\$ENV{DESTDIR}/${INSTALL_DIR}")
 install (CODE "configure_file(\"${CMAKE_BINARY_DIR}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" \"${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/OpenCASCADECompileDefinitionsAndFlags-\${CMAKE_INSTALL_CONFIG_NAME_LOWER}.cmake\" COPYONLY)")
 
 foreach (OCCT_MODULE ${OCCT_MODULES})
Index: occt-V7_6_3/adm/templates/OpenCASCADEConfig.cmake.in
===================================================================
--- occt-V7_6_3.orig/adm/templates/OpenCASCADEConfig.cmake.in
+++ occt-V7_6_3/adm/templates/OpenCASCADEConfig.cmake.in
@@ -27,7 +27,7 @@ get_filename_component (OpenCASCADE_INST
 if (OpenCASCADE_INSTALL_PREFIX MATCHES "/cmake$")
   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}$")