Added possibility to use non-default Nix.

svn path=/nixpkgs/trunk/; revision=9663

pkgs/tools/package-management/nix/custom.nix

@@ -0,0 +1,24 @@
+{ stdenv, fetchurl, aterm, db4, perl, curl, bzip2, openssl ? null
+, storeDir ? "/nix/store"
+, stateDir ? "/nix/var"
+,src
+}:
+
+stdenv.mkDerivation {
+  name = "nix-custom";
+  
+  inherit src;
+
+  buildInputs = [perl curl openssl];
+
+  configureFlags = "
+    --with-store-dir=${storeDir} --localstatedir=${stateDir}
+    --with-aterm=${aterm} --with-bdb=${db4} --with-bzip2=${bzip2}
+    --disable-init-state";
+
+  meta = {
+    description = "The Nix Deployment System";
+    homepage = http://nix.cs.uu.nl/;
+    license = "LGPL";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -4524,6 +4524,12 @@ rec {
     db4 = db45;
   };
 
+  nixCustomFun = src: (import ../tools/package-management/nix/custom.nix {
+    inherit fetchurl stdenv perl curl bzip2 openssl src;
+    aterm = aterm242fixes;
+    db4 = db45;
+  });
+
   ntfs3g = import ../misc/ntfs-3g {
     inherit fetchurl stdenv fuse pkgconfig;
   };