diff --git a/pkgs/applications/misc/sigal/default.nix b/pkgs/applications/misc/sigal/default.nix
index d66ca8586ec4..e08ccbb025fd 100644
--- a/pkgs/applications/misc/sigal/default.nix
+++ b/pkgs/applications/misc/sigal/default.nix
@@ -1,11 +1,11 @@
-{ lib, buildPythonApplication, fetchurl, pythonPackages }:
+{ lib, buildPythonApplication, fetchPypi, pythonPackages }:
 
 buildPythonApplication rec {
   version = "1.0.1";
-  name    = "sigal-${version}";
+  pname   = "sigal";
 
-  src = fetchurl {
-    url = "mirror://pypi/s/sigal/${name}.tar.gz";
+  src = fetchPypi {
+    inherit version pname;
     sha256 = "198g2r8bii6a0p44mlk1wg07jjv95xpfvnqhhxxziqpizc776b34";
   };
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f23bc44c6a73..426af532a988 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4520,7 +4520,7 @@ with pkgs;
   siege = callPackage ../tools/networking/siege {};
 
   sigal = callPackage ../applications/misc/sigal {
-    inherit (pythonPackages) buildPythonApplication;
+    inherit (pythonPackages) buildPythonApplication fetchPypi;
   };
 
   sigil = libsForQt56.callPackage ../applications/editors/sigil { };