diff --git a/pkgs/servers/sql/postgresql/buildPostgresqlExtension.nix b/pkgs/servers/sql/postgresql/buildPostgresqlExtension.nix
index 87847c368eba..03797b610827 100644
--- a/pkgs/servers/sql/postgresql/buildPostgresqlExtension.nix
+++ b/pkgs/servers/sql/postgresql/buildPostgresqlExtension.nix
@@ -60,70 +60,88 @@
   lib,
   stdenv,
   postgresql,
+  nix-update-script,
 }:
 
 args:
 
 let
-  buildPostgresqlExtension = finalAttrs: prevAttrs: {
-    buildInputs = [ postgresql ] ++ prevAttrs.buildInputs or [ ];
+  buildPostgresqlExtension =
+    finalAttrs:
+    {
+      enableUpdateScript ? true,
+      ...
+    }@prevAttrs:
+    {
+      passthru =
+        prevAttrs.passthru or { }
+        // lib.optionalAttrs enableUpdateScript {
+          updateScript =
+            prevAttrs.passthru.updateScript or (nix-update-script (
+              lib.optionalAttrs (lib.hasInfix "unstable" prevAttrs.version) {
+                extraArgs = [ "--version=branch" ];
+              }
+            ));
+        };
 
-    installFlags = [
-      "DESTDIR=${placeholder "out"}"
-    ] ++ prevAttrs.installFlags or [ ];
+      buildInputs = [ postgresql ] ++ prevAttrs.buildInputs or [ ];
 
-    postInstall =
-      ''
-        # DESTDIR + pg_config install the files into
-        # /nix/store/<extension>/nix/store/<postgresql>/...
-        # We'll now remove the /nix/store/<postgresql> part:
-        if [[ -d "$out${postgresql}" ]]; then
-            cp -alt "$out" "$out${postgresql}"/*
-            rm -r "$out${postgresql}"
-        fi
+      installFlags = [
+        "DESTDIR=${placeholder "out"}"
+      ] ++ prevAttrs.installFlags or [ ];
 
-        if [[ -d "$out${postgresql.dev}" ]]; then
-            mkdir -p "''${dev:-$out}"
-            cp -alt "''${dev:-$out}" "$out${postgresql.dev}"/*
-            rm -r "$out${postgresql.dev}"
-        fi
+      postInstall =
+        ''
+          # DESTDIR + pg_config install the files into
+          # /nix/store/<extension>/nix/store/<postgresql>/...
+          # We'll now remove the /nix/store/<postgresql> part:
+          if [[ -d "$out${postgresql}" ]]; then
+              cp -alt "$out" "$out${postgresql}"/*
+              rm -r "$out${postgresql}"
+          fi
 
-        if [[ -d "$out${postgresql.lib}" ]]; then
-            mkdir -p "''${lib:-$out}"
-            cp -alt "''${lib:-$out}" "$out${postgresql.lib}"/*
-            rm -r "$out${postgresql.lib}"
-        fi
+          if [[ -d "$out${postgresql.dev}" ]]; then
+              mkdir -p "''${dev:-$out}"
+              cp -alt "''${dev:-$out}" "$out${postgresql.dev}"/*
+              rm -r "$out${postgresql.dev}"
+          fi
 
-        if [[ -d "$out${postgresql.doc}" ]]; then
-            mkdir -p "''${doc:-$out}"
-            cp -alt "''${doc:-$out}" "$out${postgresql.doc}"/*
-            rm -r "$out${postgresql.doc}"
-        fi
+          if [[ -d "$out${postgresql.lib}" ]]; then
+              mkdir -p "''${lib:-$out}"
+              cp -alt "''${lib:-$out}" "$out${postgresql.lib}"/*
+              rm -r "$out${postgresql.lib}"
+          fi
 
-        if [[ -d "$out${postgresql.man}" ]]; then
-            mkdir -p "''${man:-$out}"
-            cp -alt "''${man:-$out}" "$out${postgresql.man}"/*
-            rm -r "$out${postgresql.man}"
-        fi
+          if [[ -d "$out${postgresql.doc}" ]]; then
+              mkdir -p "''${doc:-$out}"
+              cp -alt "''${doc:-$out}" "$out${postgresql.doc}"/*
+              rm -r "$out${postgresql.doc}"
+          fi
 
-        # In some cases (postgis) parts of the install script
-        # actually work "OK", before we add DESTDIR, so some
-        # files end up in
-        # /nix/store/<extension>/nix/store/<extension>/...
-        if [[ -d "$out$out" ]]; then
-            cp -alt "$out" "$out$out"/*
-            rm -r "$out$out"
-        fi
+          if [[ -d "$out${postgresql.man}" ]]; then
+              mkdir -p "''${man:-$out}"
+              cp -alt "''${man:-$out}" "$out${postgresql.man}"/*
+              rm -r "$out${postgresql.man}"
+          fi
 
-        if [[ -d "$out/nix/store" ]]; then
-            if ! rmdir "$out/nix/store" "$out/nix"; then
-              find "$out/nix"
-              nixErrorLog 'Found left-overs in $out/nix/store, make sure to move them into $out properly.'
-              exit 1
-            fi
-        fi
-      ''
-      + prevAttrs.postInstall or "";
-  };
+          # In some cases (postgis) parts of the install script
+          # actually work "OK", before we add DESTDIR, so some
+          # files end up in
+          # /nix/store/<extension>/nix/store/<extension>/...
+          if [[ -d "$out$out" ]]; then
+              cp -alt "$out" "$out$out"/*
+              rm -r "$out$out"
+          fi
+
+          if [[ -d "$out/nix/store" ]]; then
+              if ! rmdir "$out/nix/store" "$out/nix"; then
+                find "$out/nix"
+                nixErrorLog 'Found left-overs in $out/nix/store, make sure to move them into $out properly.'
+                exit 1
+              fi
+          fi
+        ''
+        + prevAttrs.postInstall or "";
+    };
 in
 stdenv.mkDerivation (lib.extends buildPostgresqlExtension (lib.toFunction args))
diff --git a/pkgs/servers/sql/postgresql/ext/age.nix b/pkgs/servers/sql/postgresql/ext/age.nix
index a9f74bc76ec1..4811ec01ccb5 100644
--- a/pkgs/servers/sql/postgresql/ext/age.nix
+++ b/pkgs/servers/sql/postgresql/ext/age.nix
@@ -28,6 +28,7 @@ buildPostgresqlExtension rec {
     "PERL=${perl}/bin/perl"
   ];
 
+  enableUpdateScript = false;
   passthru.tests = stdenv.mkDerivation {
     inherit version src;
 
diff --git a/pkgs/servers/sql/postgresql/ext/apache_datasketches.nix b/pkgs/servers/sql/postgresql/ext/apache_datasketches.nix
index 4c8d723354d2..46b5fac3852b 100644
--- a/pkgs/servers/sql/postgresql/ext/apache_datasketches.nix
+++ b/pkgs/servers/sql/postgresql/ext/apache_datasketches.nix
@@ -36,6 +36,7 @@ buildPostgresqlExtension (finalAttrs: {
     runHook postPatch
   '';
 
+  enableUpdateScript = false;
   passthru.tests.extension = postgresqlTestExtension {
     inherit (finalAttrs) finalPackage;
     sql = ''
diff --git a/pkgs/servers/sql/postgresql/ext/cstore_fdw.nix b/pkgs/servers/sql/postgresql/ext/cstore_fdw.nix
index 2236f815a823..4b5499bfe9fa 100644
--- a/pkgs/servers/sql/postgresql/ext/cstore_fdw.nix
+++ b/pkgs/servers/sql/postgresql/ext/cstore_fdw.nix
@@ -2,7 +2,7 @@
 
 buildPostgresqlExtension rec {
   pname = "cstore_fdw";
-  version = "unstable-2022-03-08";
+  version = "1.7.0-unstable-2021-03-08";
 
   nativeBuildInputs = [ protobufc ];
 
diff --git a/pkgs/servers/sql/postgresql/ext/jsonb_deep_sum.nix b/pkgs/servers/sql/postgresql/ext/jsonb_deep_sum.nix
index eb84ec54c028..7fe4f22254f3 100644
--- a/pkgs/servers/sql/postgresql/ext/jsonb_deep_sum.nix
+++ b/pkgs/servers/sql/postgresql/ext/jsonb_deep_sum.nix
@@ -2,7 +2,7 @@
 
 buildPostgresqlExtension rec {
   pname = "jsonb_deep_sum";
-  version = "unstable-2021-12-24";
+  version = "0-unstable-2021-12-24";
 
   src = fetchFromGitHub {
     owner = "furstenheim";
diff --git a/pkgs/servers/sql/postgresql/ext/pg_hint_plan.nix b/pkgs/servers/sql/postgresql/ext/pg_hint_plan.nix
index db5c360196e2..5adf5486113f 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_hint_plan.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_hint_plan.nix
@@ -44,6 +44,8 @@ buildPostgresqlExtension {
     substituteInPlace Makefile --replace "LDFLAGS+=-Wl,--build-id" ""
   '';
 
+  enableUpdateScript = false;
+
   meta = with lib; {
     description = "Extension to tweak PostgreSQL execution plans using so-called 'hints' in SQL comments";
     homepage = "https://github.com/ossc-db/pg_hint_plan";
diff --git a/pkgs/servers/sql/postgresql/ext/pg_similarity.nix b/pkgs/servers/sql/postgresql/ext/pg_similarity.nix
index 4ec5bd83fc47..19441807b515 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_similarity.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_similarity.nix
@@ -1,8 +1,8 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, postgresql, unstableGitUpdater, buildPostgresqlExtension }:
+{ stdenv, lib, fetchFromGitHub, fetchpatch, postgresql, buildPostgresqlExtension }:
 
 buildPostgresqlExtension {
   pname = "pg_similarity";
-  version = "1.0-unstable-2021-01-12";
+  version = "pg_similarity_1_0-unstable-2021-01-12";
 
   src = fetchFromGitHub {
     owner = "eulerto";
@@ -23,8 +23,6 @@ buildPostgresqlExtension {
 
   makeFlags = [ "USE_PGXS=1" ];
 
-  passthru.updateScript = unstableGitUpdater {};
-
   meta = {
     description = "Extension to support similarity queries on PostgreSQL";
     longDescription = ''
diff --git a/pkgs/servers/sql/postgresql/ext/pg_squeeze.nix b/pkgs/servers/sql/postgresql/ext/pg_squeeze.nix
index ba2f4443c557..fa4225f3389d 100644
--- a/pkgs/servers/sql/postgresql/ext/pg_squeeze.nix
+++ b/pkgs/servers/sql/postgresql/ext/pg_squeeze.nix
@@ -1,16 +1,17 @@
-{ lib, stdenv, fetchFromGitHub, postgresql, postgresqlTestExtension, buildPostgresqlExtension }:
+{ lib, stdenv, fetchFromGitHub, postgresql, postgresqlTestExtension, buildPostgresqlExtension, nix-update-script }:
 
 buildPostgresqlExtension (finalAttrs: {
   pname = "pg_squeeze";
-  version = "1.7.0";
+  version = "${builtins.replaceStrings ["_"] ["."] (lib.strings.removePrefix "REL" finalAttrs.src.rev)}";
 
   src = fetchFromGitHub {
     owner = "cybertec-postgresql";
     repo = "pg_squeeze";
-    rev = "REL${builtins.replaceStrings ["."] ["_"] finalAttrs.version}";
+    rev = "REL1_7_0";
     hash = "sha256-Kh1wSOvV5Rd1CG/na3yzbWzvaR8SJ6wmTZOnM+lbgik=";
   };
 
+  passthru.updateScript = nix-update-script { extraArgs = [ "--version-regex=REL(.*)" ]; };
   passthru.tests.extension = postgresqlTestExtension {
     inherit (finalAttrs) finalPackage;
     postgresqlExtraSettings = ''
diff --git a/pkgs/servers/sql/postgresql/ext/pgaudit.nix b/pkgs/servers/sql/postgresql/ext/pgaudit.nix
index d50da6c7e282..91c081eaf955 100644
--- a/pkgs/servers/sql/postgresql/ext/pgaudit.nix
+++ b/pkgs/servers/sql/postgresql/ext/pgaudit.nix
@@ -43,6 +43,8 @@ buildPostgresqlExtension {
 
   makeFlags = [ "USE_PGXS=1" ];
 
+  enableUpdateScript = false;
+
   meta = with lib; {
     description = "Open Source PostgreSQL Audit Logging";
     homepage = "https://github.com/pgaudit/pgaudit";
diff --git a/pkgs/servers/sql/postgresql/ext/pgroonga.nix b/pkgs/servers/sql/postgresql/ext/pgroonga.nix
index 3d855f5e1977..6cd900be5f16 100644
--- a/pkgs/servers/sql/postgresql/ext/pgroonga.nix
+++ b/pkgs/servers/sql/postgresql/ext/pgroonga.nix
@@ -1,18 +1,21 @@
-{ lib, stdenv, fetchurl, pkg-config, postgresql, msgpack-c, groonga, buildPostgresqlExtension }:
+{ lib, stdenv, fetchFromGitHub, pkg-config, postgresql, msgpack-c, groonga, buildPostgresqlExtension, xxHash }:
 
 buildPostgresqlExtension rec {
   pname = "pgroonga";
   version = "3.2.3";
 
-  src = fetchurl {
-    url = "https://packages.groonga.org/source/${pname}/${pname}-${version}.tar.gz";
-    hash = "sha256-k9+DgiLzU2cA3jvw3pMF7/FmDGxsCYtAOaUtf2LMTnw=";
+  src = fetchFromGitHub {
+    owner = "pgroonga";
+    repo = "pgroonga";
+    rev = "${version}";
+    hash = "sha256-bDCDfb78r/HUa7LuZZrwrSZEFcevA1pwSy8/tcCh/oE=";
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ msgpack-c groonga ];
+  buildInputs = [ msgpack-c groonga xxHash ];
 
   makeFlags = [
+    "HAVE_XXHASH=1"
     "HAVE_MSGPACK=1"
     "MSGPACK_PACKAGE_NAME=msgpack-c"
   ];
diff --git a/pkgs/servers/sql/postgresql/ext/plr.nix b/pkgs/servers/sql/postgresql/ext/plr.nix
index 1c2266e7cfb6..2aece8cee9d1 100644
--- a/pkgs/servers/sql/postgresql/ext/plr.nix
+++ b/pkgs/servers/sql/postgresql/ext/plr.nix
@@ -2,12 +2,12 @@
 
 buildPostgresqlExtension rec {
   pname = "plr";
-  version = "8.4.7";
+  version = "${builtins.replaceStrings ["_"] ["."] (lib.strings.removePrefix "REL" src.rev)}";
 
   src = fetchFromGitHub {
     owner = "postgres-plr";
     repo = "plr";
-    rev = "REL${builtins.replaceStrings ["."] ["_"] version}";
+    rev = "REL8_4_7";
     sha256 = "sha256-PdvFEmtKfLT/xfaf6obomPR5hKC9F+wqpfi1heBphRk=";
   };
 
diff --git a/pkgs/servers/sql/postgresql/ext/postgis.nix b/pkgs/servers/sql/postgresql/ext/postgis.nix
index 68aefc1e605d..cca196dab006 100644
--- a/pkgs/servers/sql/postgresql/ext/postgis.nix
+++ b/pkgs/servers/sql/postgresql/ext/postgis.nix
@@ -1,5 +1,5 @@
 {
-  fetchurl,
+  fetchFromGitHub,
   lib,
   stdenv,
   perl,
@@ -22,6 +22,10 @@
   jitSupport,
   llvm,
   buildPostgresqlExtension,
+  autoconf,
+  automake,
+  libtool,
+  which,
 }:
 
 let
@@ -36,9 +40,11 @@ buildPostgresqlExtension (finalAttrs: {
     "doc"
   ];
 
-  src = fetchurl {
-    url = "https://download.osgeo.org/postgis/source/postgis-${finalAttrs.version}.tar.gz";
-    hash = "sha256-ymmKIswrKzRnrE4GO0OihBPzAE3dUFvczddMVqZH9RA=";
+  src = fetchFromGitHub {
+    owner = "postgis";
+    repo = "postgis";
+    rev = "${finalAttrs.version}";
+    hash = "sha256-wh7Lav2vnKzGWuSvvMFvAaGV7ynD+KgPsFUgujdtzlA=";
   };
 
   buildInputs = [
@@ -51,8 +57,12 @@ buildPostgresqlExtension (finalAttrs: {
     pcre2.dev
   ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
   nativeBuildInputs = [
+    autoconf
+    automake
+    libtool
     perl
     pkg-config
+    which
   ] ++ lib.optional jitSupport llvm;
   dontDisableStatic = true;
 
@@ -70,7 +80,7 @@ buildPostgresqlExtension (finalAttrs: {
 
   setOutputFlags = false;
   preConfigure = ''
-    sed -i 's@/usr/bin/file@${file}/bin/file@' configure
+    ./autogen.sh
   '';
 
   configureFlags = [
diff --git a/pkgs/servers/sql/postgresql/ext/wal2json.nix b/pkgs/servers/sql/postgresql/ext/wal2json.nix
index adc57f333fcf..9562c738eb1f 100644
--- a/pkgs/servers/sql/postgresql/ext/wal2json.nix
+++ b/pkgs/servers/sql/postgresql/ext/wal2json.nix
@@ -8,12 +8,14 @@
 
 buildPostgresqlExtension rec {
   pname = "wal2json";
-  version = "2.6";
+  version = "${builtins.replaceStrings [ "_" ] [ "." ] (
+    lib.strings.removePrefix "wal2json_" src.rev
+  )}";
 
   src = fetchFromGitHub {
     owner = "eulerto";
     repo = "wal2json";
-    rev = "wal2json_${builtins.replaceStrings [ "." ] [ "_" ] version}";
+    rev = "wal2json_2_6";
     sha256 = "sha256-+QoACPCKiFfuT2lJfSUmgfzC5MXf75KpSoc2PzPxKyM=";
   };
 
@@ -24,7 +26,7 @@ buildPostgresqlExtension rec {
   meta = with lib; {
     description = "PostgreSQL JSON output plugin for changeset extraction";
     homepage = "https://github.com/eulerto/wal2json";
-    changelog = "https://github.com/eulerto/wal2json/releases/tag/wal2json_${version}";
+    changelog = "https://github.com/eulerto/wal2json/releases/tag/${src.rev}";
     maintainers = with maintainers; [ euank ];
     platforms = postgresql.meta.platforms;
     license = licenses.bsd3;