diff --git a/doc/release-notes.xml b/doc/release-notes.xml
index 0a57aa7da189..82a43c2887b6 100644
--- a/doc/release-notes.xml
+++ b/doc/release-notes.xml
@@ -5,7 +5,7 @@
 <title>Nixpkgs Release Notes</title>
 
 
-<section><title>Release 0.13 (January NNN, 2010)</title>
+<section><title>Release 0.13 (February 5, 2010)</title>
 
 <para>As always, there are many changes.  Some of the most important
 updates are:
diff --git a/maintainers/scripts/copy-tarballs.sh b/maintainers/scripts/copy-tarballs.sh
index 76ced8a01d90..c8f357100036 100755
--- a/maintainers/scripts/copy-tarballs.sh
+++ b/maintainers/scripts/copy-tarballs.sh
@@ -2,7 +2,7 @@
 
 distDir=/data/webserver/tarballs
 
-urls=$(nix-instantiate --eval-only --xml --strict pkgs/top-level/build-for-release.nix \
+urls=$(nix-instantiate --eval-only --xml --strict ./eval-release.nix \
     | grep -A2 'name="urls"' \
     | grep '<string value=' \
     | sed 's/.*"\(.*\)".*/\1/' \
diff --git a/maintainers/scripts/eval-release.nix b/maintainers/scripts/eval-release.nix
new file mode 100644
index 000000000000..64dbbd15cf38
--- /dev/null
+++ b/maintainers/scripts/eval-release.nix
@@ -0,0 +1,20 @@
+# Evaluate `release.nix' like Hydra would (i.e. call each job
+# attribute with the expected `system' argument).  Too bad
+# nix-instantiate can't to do this.
+
+let
+
+  lib = (import ../.. {}).lib;
+
+  rel = removeAttrs (import ../../pkgs/top-level/release.nix) ["tarball"];
+
+  maybe = x: let y = builtins.tryEval x; in if y.success then y.value else null;
+
+  call = attrs: lib.flip lib.mapAttrs attrs
+    (n: v: builtins.trace n (
+      if builtins.isFunction v then maybe (v { system = "i686-linux"; })
+      else if builtins.isAttrs v then call v
+      else null
+    ));
+
+in call rel