Specify use_sources=True in cython compilation

Author: user202729

src/sage/misc/cython.py

@@ -60,7 +60,7 @@ def _standard_libs_libdirs_incdirs_aliases():
     if SAGE_LOCAL:
         standard_libdirs.append(os.path.join(SAGE_LOCAL, "lib"))
     standard_libdirs.extend(aliases["CBLAS_LIBDIR"] + aliases["NTL_LIBDIR"])
-    standard_incdirs = sage_include_directories() + aliases["CBLAS_INCDIR"] + aliases["NTL_INCDIR"]
+    standard_incdirs = sage_include_directories(use_sources=True) + aliases["CBLAS_INCDIR"] + aliases["NTL_INCDIR"]
     return standard_libs, standard_libdirs, standard_incdirs, aliases
 
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