diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 4d4f73ad7c2..518c1baad5a 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -201,12 +201,12 @@ in rec {
 
   nixFlakes = lib.lowPrio (callPackage common rec {
     name = "nix-2.4${suffix}";
-    suffix = "pre20190913_a25c022";
+    suffix = "pre20190922_382aa05";
     src = fetchFromGitHub {
       owner = "NixOS";
       repo = "nix";
-      rev = "a25c022af3fa0a35be406942869edae1bdff2cf8";
-      hash = "sha256-HIvgrkXxQ57TPcf2pn9PkSDzM4XOCwXa1zYyIvcAdpg=";
+      rev = "382aa05ff71b61379f5c2792eaf517bdf4a5c5bf";
+      hash = "sha256-k4vV3Q1YVmLd+49AETnsSGetpDjD6sdd9yBrnpi8Q3g=";
     };
     fromGit = true;