diff --git a/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixos/modules/installer/tools/nix-fallback-paths.nix
index 065cea470fbb..31aeaad80d60 100644
--- a/nixos/modules/installer/tools/nix-fallback-paths.nix
+++ b/nixos/modules/installer/tools/nix-fallback-paths.nix
@@ -1,7 +1,7 @@
 {
-  x86_64-linux = "/nix/store/hapw7q1fkjxvprnkcgw9ppczavg4daj2-nix-2.4";
-  i686-linux = "/nix/store/8qlvh8pp5j8wgrzj3is2jlbhgrwgsiy9-nix-2.4";
-  aarch64-linux = "/nix/store/h48lkygcqj4hdibbdnpl67q7ks6vkrd6-nix-2.4";
-  x86_64-darwin = "/nix/store/c3mvzszvyzakvcp9spnjvsb8m2bpjk7m-nix-2.4";
-  aarch64-darwin = "/nix/store/hbfqs62r0hga2yr4zi5kc7fzhf71bq9n-nix-2.4";
+  x86_64-linux = "/nix/store/67amfijcvhqfgz4bwf2izsvbnklwjbvk-nix-2.6.0";
+  i686-linux = "/nix/store/kinl99f619b2xsma4qnzhidbp65axyzm-nix-2.6.0";
+  aarch64-linux = "/nix/store/8zpm63nn7k4n1alp9a0fcilpgc8j014z-nix-2.6.0";
+  x86_64-darwin = "/nix/store/hw5v03wnc0k1pwgiyhblwlxb1fx5zyx8-nix-2.6.0";
+  aarch64-darwin = "/nix/store/669p1vjnzi56fib98qczwlaglcwcnip4-nix-2.6.0";
 }
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index f389da8b4b0b..ffbe598b9291 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -62,8 +62,7 @@ in lib.makeExtensible (self: {
     sha256 = "sha256-xEPeMcNJVOeZtoN+d+aRwolpW8mFSEQx76HTRdlhPhg=";
   };
 
-  # FIXME: nix_2_6 is broken on aarch64-darwin for now.
-  stable = self.nix_2_5;
+  stable = self.nix_2_6;
 
   unstable = lib.lowPrio (common rec {
     version = "2.7";