Remove top-level pycrypto

See #11567.

pkgs/tools/security/knockknock/default.nix

@@ -1,6 +1,6 @@
-{ stdenv, fetchFromGitHub, buildPythonApplication, python, pycrypto, hping }:
+{ stdenv, fetchFromGitHub, pythonPackages, buildPythonApplication, hping }:
 
-buildPythonApplication rec {
+pythonPackages.buildPythonApplication rec {
   rev  = "bf14bbff";
   name = "knockknock-r${rev}";
 
@@ -11,7 +11,7 @@ buildPythonApplication rec {
     sha256 = "1chpfs3w2vkjrgay69pbdr116z1jldv53fi768a1i05fdqhy1px4";
   };
 
-  propagatedBuildInputs = [ pycrypto ];
+  propagatedBuildInputs = [ pythonPackages.pycrypto ];
 
   patchPhase = ''
     sed -i '/build\//d' setup.py

pkgs/tools/security/volatility/default.nix

@@ -1,10 +1,8 @@
-{ stdenv, fetchurl, buildPythonApplication, pycrypto }:
+{ stdenv, fetchurl, pythonPackages }:
 
-buildPythonApplication rec {
-  namePrefix = "";
+pythonPackages.buildPythonApplication rec {
   name = "volatility-2.4";
 
-
   src = fetchurl {
     url = "http://downloads.volatilityfoundation.org/releases/2.4/${name}.tar.gz";
     sha256 = "1wffrkvj2lrkqhwamyix9fy05y6g6w8h1sz2iqlm6i6ag7yxykv8";
@@ -12,7 +10,7 @@ buildPythonApplication rec {
 
   doCheck = false;
 
-  propagatedBuildInputs = [ pycrypto ];
+  propagatedBuildInputs = [ pythonPackages.pycrypto ];
 
   meta = with stdenv.lib; {
     homepage = https://code.google.com/p/volatility;