diff --git a/pkgs/development/python-modules/pycrypto/default.nix b/pkgs/development/python-modules/pycrypto/default.nix
index 5da727a08db1..b203eebf90cd 100644
--- a/pkgs/development/python-modules/pycrypto/default.nix
+++ b/pkgs/development/python-modules/pycrypto/default.nix
@@ -11,9 +11,11 @@ buildPythonPackage rec {
 
   buildInputs = [ gmp ];
 
+  doCheck = !stdenv.isDarwin; # error: AF_UNIX path too long
+
   meta = {
     homepage = "http://www.pycrypto.org/";
     description = "Python Cryptography Toolkit";
-    platforms = stdenv.lib.platforms.gnu;
+    platforms = stdenv.lib.platforms.unix;
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 7a157aa925ec..2f2d5f8d823a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5182,12 +5182,9 @@ rec {
 
     meta = {
       description = "ASN.1 tools for Python";
-
       homepage = http://pyasn1.sourceforge.net/;
-
       license = "mBSD";
-
-      platforms = stdenv.lib.platforms.gnu;  # arbitrary choice
+      platforms = stdenv.lib.platforms.unix;  # arbitrary choice
     };
   });