diff --git a/pkgs/servers/sql/postgresql/ext/periods.nix b/pkgs/servers/sql/postgresql/ext/periods.nix
index 343482d26c7b..422c76ae668d 100644
--- a/pkgs/servers/sql/postgresql/ext/periods.nix
+++ b/pkgs/servers/sql/postgresql/ext/periods.nix
@@ -1,9 +1,9 @@
 {
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  postgresql,
   buildPostgresqlExtension,
+  fetchFromGitHub,
+  lib,
+  postgresql,
+  stdenv,
 }:
 
 buildPostgresqlExtension rec {
@@ -12,16 +12,16 @@ buildPostgresqlExtension rec {
 
   src = fetchFromGitHub {
     owner = "xocolatl";
-    repo = pname;
-    rev = "v${version}";
-    sha256 = "sha256-97v6+WNDcYb/KivlE/JBlRIZ3gYHj68AlK0fylp1cPo=";
+    repo = "periods";
+    tag = "v${version}";
+    hash = "sha256-97v6+WNDcYb/KivlE/JBlRIZ3gYHj68AlK0fylp1cPo=";
   };
 
-  meta = with lib; {
+  meta = {
     description = "PostgreSQL extension implementing SQL standard functionality for PERIODs and SYSTEM VERSIONING";
     homepage = "https://github.com/xocolatl/periods";
-    maintainers = with maintainers; [ ivan ];
+    maintainers = with lib.maintainers; [ ivan ];
     platforms = postgresql.meta.platforms;
-    license = licenses.postgresql;
+    license = lib.licenses.postgresql;
   };
 }