Python 3.6: add less

pkgs/development/interpreters/python/3.6/default.nix

@@ -3,6 +3,7 @@
 , bzip2
 , db
 , gdbm
+, less
 , libX11, xproto
 , lzma
 , ncurses
@@ -44,6 +45,11 @@ let
     libX11
     xproto
   ] ++ optionals stdenv.isDarwin [ CF configd ];
+
+  propagatedBuildInputs = [
+    less
+  ];
+
 in
 stdenv.mkDerivation {
   name = "python3-${fullVersion}";
@@ -51,6 +57,7 @@ stdenv.mkDerivation {
   inherit majorVersion version;
 
   inherit buildInputs;
+  inherit propagatedBuildInputs;
 
   src = fetchurl {
     url = "https://www.python.org/ftp/python/${majorVersion}.0/Python-${fullVersion}.tar.xz";