diff --git a/pkgs/tools/security/diceware/default.nix b/pkgs/development/python-modules/diceware/default.nix
similarity index 86%
rename from pkgs/tools/security/diceware/default.nix
rename to pkgs/development/python-modules/diceware/default.nix
index f32d63cfc10..8e35eabfb0d 100644
--- a/pkgs/tools/security/diceware/default.nix
+++ b/pkgs/development/python-modules/diceware/default.nix
@@ -1,10 +1,10 @@
-{ lib
-, python3Packages
+{ lib, buildPythonPackage, fetchPypi
+, pytestrunner
+, setuptools
+, coverage, pytest
 }:
 
-with python3Packages;
-
-buildPythonApplication rec {
+buildPythonPackage rec {
   pname = "diceware";
   version = "0.9.6";
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ff31fa43dbc..30c81e06d09 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -26779,7 +26779,7 @@ in
 
   simplehttp2server = callPackage ../servers/simplehttp2server { };
 
-  diceware = callPackage ../tools/security/diceware { };
+  diceware = with python3Packages; toPythonApplication diceware;
 
   xml2rfc = with python3Packages; toPythonApplication xml2rfc;
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 95c3fabc059..56becb6b559 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -645,6 +645,8 @@ in {
 
   dkimpy = callPackage ../development/python-modules/dkimpy { };
 
+  diceware = callPackage ../development/python-modules/diceware { };
+
   dictionaries = callPackage ../development/python-modules/dictionaries { };
 
   diff_cover = callPackage ../development/python-modules/diff_cover { };