diff --git a/external/external_build.cmake b/external/external_build.cmake
index 4502eca..ae8242a 100644
--- a/external/external_build.cmake
+++ b/external/external_build.cmake
@@ -155,9 +155,11 @@ if (INTERNAL_BOOST)
   set(Boost_INCLUDE_DIRS ${BOOST_SOURCE_DIR} CACHE STRING "Boost path" FORCE)
   set(Boost_LIBRARIES ${BOOST_SOURCE_DIR}/stage/lib/libboost_python.a CACHE STRING "Boost libraries" FORCE)
   set(Boost_FOUND YES)
+  set(Boost_DEP boost)
 
 ELSE (INTERNAL_BOOST)
   find_package(Boost 1.53)
+  set(Boost_DEP)
 endif (INTERNAL_BOOST)
 mark_as_advanced(Boost_INCLUDE_DIRS Boost_LIBRARIES)
 
diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index da3aaac..da703d4 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -54,7 +54,9 @@ if (Boost_FOUND)
   include_directories(${Boost_INCLUDE_DIRS})
   add_library(_cosmo_bispectrum MODULE _cosmo_bispectrum.cpp)
   target_link_libraries(_cosmo_bispectrum ${MATH_LIBRARY})
-  add_dependencies(_cosmo_bispectrum boost)
+  if (Boost_DEP)
+    add_dependencies(_cosmo_bispectrum ${Boost_DEP})
+  endif()
   SET(ct_TARGETS ${ct_TARGETS} _cosmo_bispectrum)
 endif()
 
diff --git a/python_sample/test_bispectrum.py b/python_sample/test_bispectrum.py
index 1737a04..2d509f0 100644
--- a/python_sample/test_bispectrum.py
+++ b/python_sample/test_bispectrum.py
@@ -17,7 +17,7 @@ def myfun(N):
   
   y = BB/x
 
-  np.savez("bispec_%d.npy" % N, y=y, B=B, P=P, rho=rho);
+  np.savez("bispec_%d.npz" % N, y=y, B_nt=B[0], B_r=B[1], P_n=P[0], P=P[1], rho=rho);
   
   
 print( timeit.timeit('from __main__ import myfun; myfun(16)', number=1) )