diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index de417766693..d25125668cc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4362,6 +4362,11 @@ let pkgs = rec {
     inherit fetchurl stdenv apacheHttpd python;
   };
 
+  postfix = import ../servers/mail/postfix {
+    inherit fetchurl stdenv db4;
+    glibc = stdenv.glibc;
+  };
+
   tomcat_connectors = import ../servers/http/apache-modules/tomcat-connectors {
     inherit fetchurl stdenv apacheHttpd jdk;
   };