diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index e8255ccb2966..55f783d792f0 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -5,11 +5,11 @@
 }:
 
 stdenv.mkDerivation rec {
-  name = "nix-1.5.1";
+  name = "nix-1.5.2";
 
   src = fetchurl {
     url = "http://nixos.org/releases/nix/${name}/${name}.tar.xz";
-    sha256 = "c53ec8a5518445bea658e1edb4e3be8c315b583aefc55d6969f2bf6f6c805239";
+    sha256 = "84880fcb94c06b11f66b28837f9c145aa3d65eb0e173fd6da195794a7b0331d1";
   };
 
   nativeBuildInputs = [ perl pkgconfig ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e5ba985006c1..1f9722031ae0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9084,10 +9084,13 @@ let
     stateDir = config.nix.stateDir or "/nix/var";
   };
 
+  nixUnstable = nixStable;
+  /*
   nixUnstable = callPackage ../tools/package-management/nix/unstable.nix {
     storeDir = config.nix.storeDir or "/nix/store";
     stateDir = config.nix.stateDir or "/nix/var";
   };
+  */
 
   nut = callPackage ../applications/misc/nut { };