diff --git a/pkgs/tools/package-management/nix/unstable.nix b/pkgs/tools/package-management/nix/unstable.nix
index 1a507f20a04..bfcf3697d8a 100644
--- a/pkgs/tools/package-management/nix/unstable.nix
+++ b/pkgs/tools/package-management/nix/unstable.nix
@@ -3,14 +3,14 @@
 , stateDir ? "/nix/var"
 }:
 
-let version = "0.12pre10505"; in
+let version = "0.12pre10798"; in
 
 stdenv.mkDerivation {
   name = "nix-${version}";
   
   src = fetchurl {
     url = "http://nix.cs.uu.nl/dist/nix/nix-${version}/nix-${version}.tar.bz2";
-    md5 = "44dd2927ce97f12b3f110a7ad991828e";
+    md5 = "1f3d0a72c9bf1297c2daa32e601bde82";
   };
 
   buildInputs = [perl curl openssl];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9cb844a6eaa..1bf3f007775 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5760,17 +5760,16 @@ rec {
     db4 = db45;
   };
 
-  nixCustomFun = src: preConfigure: configureFlags :
-  (import ../tools/package-management/nix/custom.nix {
-    inherit fetchurl stdenv perl curl bzip2 openssl src preConfigure automake 
+  nixCustomFun = src: preConfigure: configureFlags:
+    import ../tools/package-management/nix/custom.nix {
+      inherit fetchurl stdenv perl curl bzip2 openssl src preConfigure automake 
         autoconf libtool configureFlags;
-    bison = bison23;
-    flex = flex2533;
-    aterm = aterm242fixes;
-    db4 = db45;
-    inherit docbook5_xsl libxslt docbook5 docbook_xml_dtd_43 w3m;
-
-  });
+      bison = bison23;
+      flex = flex2533;
+      aterm = aterm242fixes;
+      db4 = db45;
+      inherit docbook5_xsl libxslt docbook5 docbook_xml_dtd_43 w3m;
+    };
 
   ntfs3g = import ../misc/ntfs-3g {
     inherit fetchurl stdenv fuse pkgconfig;