diff --git a/pkgs/servers/sql/postgresql/ext/plr.nix b/pkgs/servers/sql/postgresql/ext/plr.nix
index c1148bf92c39..b55812c3f3ce 100644
--- a/pkgs/servers/sql/postgresql/ext/plr.nix
+++ b/pkgs/servers/sql/postgresql/ext/plr.nix
@@ -1,11 +1,11 @@
 {
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  pkg-config,
   R,
-  postgresql,
   buildPostgresqlExtension,
+  fetchFromGitHub,
+  lib,
+  pkg-config,
+  postgresql,
+  stdenv,
 }:
 
 buildPostgresqlExtension rec {
@@ -15,8 +15,8 @@ buildPostgresqlExtension rec {
   src = fetchFromGitHub {
     owner = "postgres-plr";
     repo = "plr";
-    rev = "REL8_4_7";
-    sha256 = "sha256-PdvFEmtKfLT/xfaf6obomPR5hKC9F+wqpfi1heBphRk=";
+    tag = "REL8_4_7";
+    hash = "sha256-PdvFEmtKfLT/xfaf6obomPR5hKC9F+wqpfi1heBphRk=";
   };
 
   nativeBuildInputs = [ pkg-config ];
@@ -24,12 +24,12 @@ buildPostgresqlExtension rec {
 
   makeFlags = [ "USE_PGXS=1" ];
 
-  meta = with lib; {
+  meta = {
     description = "PL/R - R Procedural Language for PostgreSQL";
     homepage = "https://github.com/postgres-plr/plr";
     changelog = "https://github.com/postgres-plr/plr/blob/${src.rev}/changelog.md";
-    maintainers = with maintainers; [ qoelet ];
+    maintainers = with lib.maintainers; [ qoelet ];
     platforms = postgresql.meta.platforms;
-    license = licenses.gpl2Only;
+    license = lib.licenses.gpl2Only;
   };
 }