diff --git a/pkgs/development/python-modules/wcwidth/default.nix b/pkgs/development/python-modules/wcwidth/default.nix
index fa993c593e1..ef453ebbf33 100644
--- a/pkgs/development/python-modules/wcwidth/default.nix
+++ b/pkgs/development/python-modules/wcwidth/default.nix
@@ -1,26 +1,26 @@
-{ stdenv, fetchurl, buildPythonPackage }:
+{ lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
-    name = "wcwidth-${version}";
-    version = "0.1.7";
+  pname = "wcwidth";
+  version = "0.1.7";
 
-    src = fetchurl {
-      url = "mirror://pypi/w/wcwidth/${name}.tar.gz";
-      sha256 = "0pn6dflzm609m4r3i8ik5ni9ijjbb5fa3vg1n7hn6vkd49r77wrx";
-    };
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0pn6dflzm609m4r3i8ik5ni9ijjbb5fa3vg1n7hn6vkd49r77wrx";
+  };
 
-    # Checks fail due to missing tox.ini file:
-    doCheck = false;
+  # Checks fail due to missing tox.ini file:
+  doCheck = false;
 
-    meta = with stdenv.lib; {
-      description = "Measures number of Terminal column cells of wide-character codes";
-      longDescription = ''
-        This API is mainly for Terminal Emulator implementors -- any Python
-        program that attempts to determine the printable width of a string on
-        a Terminal. It is implemented in python (no C library calls) and has
-        no 3rd-party dependencies.
-      '';
-      homepage = https://github.com/jquast/wcwidth;
-      license = licenses.mit;
-    };
-  }
+  meta = with lib; {
+    description = "Measures number of Terminal column cells of wide-character codes";
+    longDescription = ''
+      This API is mainly for Terminal Emulator implementors -- any Python
+      program that attempts to determine the printable width of a string on
+      a Terminal. It is implemented in python (no C library calls) and has
+      no 3rd-party dependencies.
+    '';
+    homepage = https://github.com/jquast/wcwidth;
+    license = licenses.mit;
+  };
+}