diff --git a/pkgs/servers/sql/postgresql/8.4.0.nix b/pkgs/servers/sql/postgresql/8.4.0.nix
new file mode 100644
index 00000000000..e069453ed72
--- /dev/null
+++ b/pkgs/servers/sql/postgresql/8.4.0.nix
@@ -0,0 +1,14 @@
+args: with args;
+
+stdenv.mkDerivation rec {
+  name = "postgresql-" + version;
+  LC_ALL = "en_US";
+
+  src = fetchurl {
+    url = "ftp://ftp.nl.postgresql.org/pub/mirror/postgresql/source/v${version}/${name}.tar.bz2";
+    sha256="01z00pgp2dmp02dq6hnsidzvkp19gwjby0xvfpwgvd2xljs57gw4";
+  };
+
+  passthru = { inherit readline; };
+  buildInputs = [zlib ncurses readline];
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cded990084a..12044bd0ebf 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4658,6 +4658,10 @@ let
     inherit fetchurl stdenv readline ncurses zlib;
   };
 
+  postgresql84 = selectVersion ../servers/sql/postgresql "8.4.0" {
+    inherit fetchurl stdenv readline ncurses zlib;
+  };
+
   postgresql_jdbc = import ../servers/sql/postgresql/jdbc {
     inherit fetchurl stdenv ant;
   };