diff -up src/module_list.py.orig src/module_list.py
--- src/module_list.py.orig	2019-10-03 16:04:08.373152682 -0300
+++ src/module_list.py	2019-10-03 16:04:19.877225413 -0300
@@ -506,10 +506,10 @@ ext_modules = [
     Extension('sage.libs.ecl',
               sources = ["sage/libs/ecl.pyx"]),
 
-    Extension("sage.libs.fes",
-             ["sage/libs/fes.pyx"],
-             language = "c",
-             libraries = ['fes']),
+#    Extension("sage.libs.fes",
+#             ["sage/libs/fes.pyx"],
+#             language = "c",
+#             libraries = ['fes']),
 
     Extension('sage.libs.flint.flint',
               sources = ["sage/libs/flint/flint.pyx"],