diff -urN XEdDSA-0.4.4.ori/setup.py XEdDSA-0.4.4/setup.py
--- XEdDSA-0.4.4.ori/setup.py	2018-09-23 16:08:35.000000000 +0200
+++ XEdDSA-0.4.4/setup.py	2018-10-30 08:21:23.338790184 +0100
@@ -22,9 +22,8 @@
     author_email = "tim@cifg.io",
     license = "MIT",
     packages = find_packages(),
-    install_requires = [ "cffi>=1.9.1", "pynacl>=1.0.1" ],
-    setup_requires   = [ "cffi>=1.9.1" ],
-    cffi_modules     = [ os.path.join("ref10", "build.py") + ":ffibuilder" ],
+    install_requires = ["pynacl>=1.0.1" ],
+    setup_requires   = [],
     python_requires  = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4",
     include_package_data = True,
     zip_safe = False,