diff --git a/doc/source/conf.py b/doc/source/conf.py
index ddd33bcf..c2681b9a 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -39,6 +39,8 @@ MOCK_MODULES = [
     "GPy.util.linalg_cython", 
     "sympy", 
     'GPy.kern.stationary_cython',
+    "sympy.utilities",
+    "sympy.utilities.lambdify",
 ]
 
 sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
diff --git a/setup.py b/setup.py
index 4d62461c..5e4357b5 100644
--- a/setup.py
+++ b/setup.py
@@ -94,15 +94,18 @@ ext_mods = [Extension(name='GPy.kern.src.stationary_cython',
             Extension(name='GPy.util.linalg_cython',
                       sources=['GPy/util/linalg_cython.c'],
                       include_dirs=[np.get_include(),'.'],
-                      extra_compile_args=compile_flags),
+                      extra_compile_args=compile_flags,
+                      extra_link_args = link_args),
             Extension(name='GPy.kern.src.coregionalize_cython',
                       sources=['GPy/kern/src/coregionalize_cython.c'],
                       include_dirs=[np.get_include(),'.'],
-                      extra_compile_args=compile_flags),
+                      extra_compile_args=compile_flags,
+                      extra_link_args = link_args),
             Extension(name='GPy.models.state_space_cython',
                       sources=['GPy/models/state_space_cython.c'],
                       include_dirs=[np.get_include(),'.'],
-                      extra_compile_args=compile_flags)]
+                      extra_compile_args=compile_flags,
+                      extra_link_args = link_args)]
 
 setup(name = 'GPy',
       version = __version__,