postgresqlPackages: some cleanup (#343309)

pkgs/servers/sql/postgresql/ext/pg_auto_failover.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, postgresql, openssl, zlib, readline, libkrb5, libxcrypt }:
+{ lib, stdenv, fetchFromGitHub, postgresql }:
 
 stdenv.mkDerivation rec {
   pname = "pg_auto_failover";

pkgs/servers/sql/postgresql/ext/pg_repack.nix

@@ -4,7 +4,6 @@
 , postgresql
 , postgresqlTestHook
 , testers
-, zlib
 }:
 
 stdenv.mkDerivation (finalAttrs: {

pkgs/servers/sql/postgresql/ext/pg_similarity.nix

@@ -12,7 +12,9 @@ stdenv.mkDerivation {
   };
 
   buildInputs = [ postgresql gcc ];
-  buildPhase = "USE_PGXS=1 make";
+
+  makeFlags = [ "USE_PGXS=1" ];
+
   installPhase = ''
     install -D pg_similarity${postgresql.dlSuffix} -t $out/lib/
     install -D ./{pg_similarity--unpackaged--1.0.sql,pg_similarity--1.0.sql,pg_similarity.control} -t $out/share/postgresql/extension

pkgs/servers/sql/postgresql/ext/plr.nix

@@ -13,9 +13,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ R postgresql ];
-  preBuild = ''
-    export USE_PGXS=1
-  '';
+
+  makeFlags = [ "USE_PGXS=1" ];
+
   installPhase = ''
     install -D plr${postgresql.dlSuffix} -t $out/lib/
     install -D {plr--*.sql,plr.control} -t $out/share/postgresql/extension

pkgs/servers/sql/postgresql/ext/repmgr.nix

@@ -5,7 +5,6 @@
 , flex
 , curl
 , json_c
-, libxcrypt
 }:
 
 stdenv.mkDerivation rec {

pkgs/servers/sql/postgresql/ext/system_stats.nix

@@ -6,7 +6,7 @@
 }:
 stdenv.mkDerivation rec {
   pname = "system_stats";
-  version = "3.0";
+  version = "3.2";
 
   buildInputs = [ postgresql ];
 
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
     owner = "EnterpriseDB";
     repo = "system_stats";
     rev = "v${version}";
-    hash = "sha256-LuX7/LOi0rl6L/kjbjq7rr2zPcGIOYB7hdZBNJ9xqak=";
+    hash = "sha256-/xXnui0S0ZjRw7P8kMAgttHVv8T41aOhM3pM8P0OTig=";
   };
 
   installPhase = ''