python.pkgs.prompt_toolkit: always use 1 with py2 and 2 with py3

pkgs/tools/admin/aws_shell/default.nix

@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchPypi
 , awscli
-, prompt_toolkit_1
+, prompt_toolkit
 , boto3
 , configobj
 , pygments
@@ -20,7 +20,7 @@ buildPythonPackage rec {
   # Why does it propagate packages that are used for testing?
   propagatedBuildInputs = [
     awscli
-    prompt_toolkit_1
+    prompt_toolkit
     boto3
     configobj
     pygments

pkgs/tools/admin/mycli/default.nix

@@ -15,7 +15,7 @@ buildPythonApplication rec {
   };
 
   propagatedBuildInputs = [
-    pymysql configobj sqlparse prompt_toolkit_1 pygments click pycrypto cli-helpers
+    pymysql configobj sqlparse prompt_toolkit pygments click pycrypto cli-helpers
   ];
 
   checkInputs = [ pytest mock glibcLocales ];