-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DVTK_INSTALL_LIBRARY_DIR=lib/paraview-${PVLIBVERSION}"
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DVTK_INSTALL_ARCHIVE_DIR=lib/paraview-${PVLIBVERSION}"
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DVTK_PYTHON_SITE_PACKAGES_SUFFIX=site-packages"
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DPARAVIEW_INSTALL_PLUGINS_DIR=lib/paraview-${PVLIBVERSION}/plugins"
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DVTKm_INSTALL_LIB_DIR=lib/paraview-${PVLIBVERSION}"
+CMAKE_OPTIONS+=" -DVTK_INSTALL_LIBRARY_DIR=lib/paraview-${PVLIBVERSION}"
+CMAKE_OPTIONS+=" -DVTK_INSTALL_ARCHIVE_DIR=lib/paraview-${PVLIBVERSION}"
+CMAKE_OPTIONS+=" -DVTK_PYTHON_SITE_PACKAGES_SUFFIX=site-packages"
+CMAKE_OPTIONS+=" -DPARAVIEW_INSTALL_PLUGINS_DIR=lib/paraview-${PVLIBVERSION}/plugins"
+CMAKE_OPTIONS+=" -DVTKm_INSTALL_LIB_DIR=lib/paraview-${PVLIBVERSION}"