diff --git a/external/external_build.cmake b/external/external_build.cmake
index a38fc1d..c8fedcf 100644
--- a/external/external_build.cmake
+++ b/external/external_build.cmake
@@ -12,6 +12,7 @@ SET(BOOST_URL "http://sourceforge.net/projects/boost/files/boost/1.61.0/boost_1_
 SET(GSL_URL "ftp://ftp.gnu.org/gnu/gsl/gsl-1.15.tar.gz" CACHE STRING "URL to download GSL from ")
 mark_as_advanced(FFTW_URL EIGEN_URL HDF5_URL NETCDF_URL BOOST_URL GSL_URL)
 
+SET(all_deps)
 
 MACRO(CHECK_CHANGE_STATE VAR) 
   IF (DEFINED _PREVIOUS_${VAR})
@@ -108,6 +109,7 @@ if (INTERNAL_HDF5)
   MESSAGE(STATUS "Internal HDF5 directory: $ENV{HDF5_ROOT}")
   MESSAGE(STATUS "Libs: ${HDF5_LIBRARIES}")
   SET(HDF5_FOUND TRUE)
+  SET(all_deps ${all_deps} hdf5)
 else (INTERNAL_HDF5)
   mark_as_advanced(CLEAR HDF5_LIBRARIES HDF5_CXX_LIBRARIES HDF5_INCLUDE_DIRS)
   if(HDF5_ROOTDIR)
@@ -210,6 +212,8 @@ if (INTERNAL_NETCDF)
   SET(NETCDF_INCLUDE_PATH ${NETCDF_BIN_DIR}/include CACHE STRING "NetCDF include" FORCE)
   SET(NETCDFCPP_INCLUDE_PATH ${NETCDF_INCLUDE_PATH} CACHE STRING "NetCDF C++ include path" FORCE)
 
+  SET(all_deps ${all_deps} netcdf netcdf-c++)
+
 ELSE(INTERNAL_NETCDF)
   find_path(NETCDF_INCLUDE_PATH NAMES netcdf.h)
   find_path(NETCDFCPP_INCLUDE_PATH NAMES netcdfcpp.h netcdf)
diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 0e67f2f..6045aca 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -88,11 +88,13 @@ message(STATUS "User python site: ${USER_PYTHON_SITE_PACKAGES}")
 
 OPTION(INSTALL_PYTHON_LOCAL OFF)
 
-IF (NOT INSTALL_PYTHON_LOCAL)
-  SET(PYTHON_SITE_PACKAGES ${SYSTEM_PYTHON_SITE_PACKAGES})
-ELSE (NOT INSTALL_PYTHON_LOCAL)
-  SET(PYTHON_SITE_PACKAGES ${USER_PYTHON_SITE_PACKAGES})
-ENDIF(NOT INSTALL_PYTHON_LOCAL)
+IF (NOT PYTHON_SITE_PACKAGES)
+  IF (NOT INSTALL_PYTHON_LOCAL)
+    SET(PYTHON_SITE_PACKAGES ${SYSTEM_PYTHON_SITE_PACKAGES})
+  ELSE (NOT INSTALL_PYTHON_LOCAL)
+    SET(PYTHON_SITE_PACKAGES ${USER_PYTHON_SITE_PACKAGES})
+  ENDIF(NOT INSTALL_PYTHON_LOCAL)
+ENDIF()
 cmessage(STATUS "Python install location: ${PYTHON_SITE_PACKAGES}")
 
 
diff --git a/sample/CMakeLists.txt b/sample/CMakeLists.txt
index 02b7a12..53429da 100644
--- a/sample/CMakeLists.txt
+++ b/sample/CMakeLists.txt
@@ -105,6 +105,12 @@ if (Boost_FOUND)
 
     add_executable(graficToDensity graficToDensity.cpp)
     target_link_libraries(graficToDensity ${tolink})
+    if (all_deps)
+      message(STATUS "Deps = ${all_deps}")
+      add_dependencies(gadgetToArray ${all_deps})
+      add_dependencies(testHDF5 ${all_deps})
+      add_dependencies(graficToDensity ${all_deps})
+    endif()
   endif()
 endif (Boost_FOUND)
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bc7ae98..927785e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -38,6 +38,7 @@ if (HDF5_FOUND)
     h5_readFlash.cpp
     loadFlash.cpp
     )
+  set_property(TARGET CosmoHDF5 PROPERTY POSITION_INDEPENDENT_CODE ${BUILD_SHARED_LIBS})
   target_include_directories(CosmoHDF5 BEFORE PRIVATE ${HDF5_INCLUDE_DIR})
 else(HDF5_FOUND)
   add_library(CosmoHDF5  OBJECT