nixpkgs/pkgs/development/python-modules/scapy/fix-version-2.patch

--- a/scapy/__init__.py	2018-03-27 17:38:52.706481269 +0200
+++ b/scapy/__init__.py	2018-03-27 17:39:56.576688890 +0200
@@ -82,9 +82,10 @@
             if match:
                 return "git-archive.dev" + match.group(1)
             elif sha1:
-                return "git-archive.dev" + sha1
+                return '2.4.0'
             else:
-                return 'unknown.version'
+                return '2.4.0'
+
 
 VERSION = _version()