COMP: superbuild: set command as a list

SuperBuild/CMakeLists.txt

@@ -47,7 +47,7 @@ else(UNIX)
     set(SB_CMAKE_COMMAND ${CMAKE_COMMAND})
   else()
     set(LDLIBVAR LD_LIBRARY_PATH)
-    set(SB_ENV_CONFIGURE_CMD "env ${LDLIBVAR}=${SB_INSTALL_PREFIX}/lib")
+    set(SB_ENV_CONFIGURE_CMD env ${LDLIBVAR}=${SB_INSTALL_PREFIX}/lib)
     set(SB_CMAKE_COMMAND env ${LDLIBVAR}=${CMAKE_INSTALL_PREFIX}/lib  ${CMAKE_COMMAND})
   endif()
 endif()