* Regression fix.

svn path=/nixpkgs/trunk/; revision=587

pkgs/servers/http/apache-httpd/default.nix

@@ -1,6 +1,11 @@
 { stdenv, fetchurl, openssl, db4, expat, perl
 , sslSupport, db4Support
 }:
+
+assert sslSupport -> !isNull openssl;
+assert db4Support -> !isNull db4;
+assert !isNull expat && !isNull perl;
+
 derivation {
   name = "apache-httpd-2.0.48";
   system = stdenv.system;
@@ -11,6 +16,9 @@ derivation {
     md5 = "466c63bb71b710d20a5c353df8c1a19c";
   };
 
+  sslSupport = sslSupport;
+  db4Support = db4Support;
+
   stdenv = stdenv;
   perl = perl;
   openssl = if sslSupport then openssl else "";