diff -up src/module_list.py.orig src/module_list.py
--- src/module_list.py.orig	2019-10-03 14:49:57.072685858 -0300
+++ src/module_list.py	2019-10-03 14:50:05.889737429 -0300
@@ -2,7 +2,7 @@ import os
 from distutils.extension import Extension
 from sage.env import SAGE_LOCAL
 
-SAGE_INC = os.path.join(SAGE_LOCAL, 'include')
+SAGE_INC = '/usr/include'
 
 #########################################################
 ### pkg-config setup
diff -up src/sage/misc/cython.py.orig src/sage/misc/cython.py
--- src/sage/misc/cython.py.orig	2019-10-03 14:49:48.553636029 -0300
+++ src/sage/misc/cython.py	2019-10-03 14:50:05.890737435 -0300
@@ -46,7 +46,7 @@ standard_libs = [
 ] + cblas_libs + [
     'ntl']
 
-standard_libdirs = [os.path.join(SAGE_LOCAL, "lib")] + cblas_library_dirs
+standard_libdirs = [os.path.realpath(os.path.join(SAGE_LOCAL, "lib"))] + cblas_library_dirs
 
 
 ################################################################