diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b42ce32ce294..3262c1d0bc03 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -825,7 +825,7 @@ let
   httpfs2 = callPackage ../tools/filesystems/httpfs { };
 
   hydra = callPackage ../development/tools/misc/hydra {
-    nix = nixSqlite;
+    nix = nixUnstable;
   };
 
   iasl = callPackage ../development/compilers/iasl { };
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 59c849118db0..f353b9c8fd69 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -2401,13 +2401,13 @@ rec {
   };
 
   nixPerl = buildPerlPackage {
-    name = "Nix-1.0pre26388";
+    name = "Nix-1.0pre29083";
     src = fetchsvn {
       url = https://svn.nixos.org/repos/nix/nix-perl/trunk;
-      rev = 26388;
-      sha256 = "0780q2hgklv841za0w2swkxbyks2h6693ab2vd617s38bjm7bppa";
+      rev = 29083;
+      sha256 = "02wfy4l355s57w7lrynbwx97nlxvasx3xfsn72gla0i8mg6pdgaw";
     };
-    NIX_PREFIX = pkgs.nixSqlite;
+    NIX_PREFIX = pkgs.nixUnstable;
     doCheck = false; # tests currently don't work
   };