--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -42,5 +42,5 @@
     IF(NOT DEFINED SETUP_PY_INSTALL_PREFIX)
       SET(SETUP_PY_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
     ENDIF()
-    INSTALL(CODE "execute_process(COMMAND ${PYTHON} ${SETUP_PY} install --prefix=\$ENV{DESTDIR}${SETUP_PY_INSTALL_PREFIX})")
+    INSTALL(CODE "execute_process(COMMAND ${PYTHON} ${SETUP_PY} install --root=\$ENV{DESTDIR} --prefix=${SETUP_PY_INSTALL_PREFIX})")
 ENDIF(PYTHON)
