diff --git a/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixos/modules/installer/tools/nix-fallback-paths.nix
index 10c37a46fdac..e4241e965403 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/3wqasl97rjiza3vd7fxjnvli2w9l30mk-nix-2.17.0";
-  i686-linux = "/nix/store/z360xswxfx55pmm1fng3hw748rbs0kkj-nix-2.17.0";
-  aarch64-linux = "/nix/store/9670sxa916xmv8n1kqs7cdvmnsrhrdjv-nix-2.17.0";
-  x86_64-darwin = "/nix/store/2rdbky9j8hc3mbgl6pnda4hkjllyfwnn-nix-2.17.0";
-  aarch64-darwin = "/nix/store/jl9qma14fb4zk9lq1k0syw2k9qm2gqjw-nix-2.17.0";
+  x86_64-linux = "/nix/store/azvn85cras6xv4z5j85fiy406f24r1q0-nix-2.18.1";
+  i686-linux = "/nix/store/9bnwy7f9h0kzdzmcnjjsjg0aak5waj40-nix-2.18.1";
+  aarch64-linux = "/nix/store/hh65xwqm9s040s3cgn9vzcmrxj0sf5ij-nix-2.18.1";
+  x86_64-darwin = "/nix/store/6zi5fqzn9n17wrk8r41rhdw4j7jqqsi3-nix-2.18.1";
+  aarch64-darwin = "/nix/store/0pbq6wzr2f1jgpn5212knyxpwmkjgjah-nix-2.18.1";
 }
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 1aab6b3353ea..0b80cd531d43 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -203,7 +203,7 @@ in lib.makeExtensible (self: ({
     else
       nix;
 
-  stable = self.nix_2_17;
+  stable = self.nix_2_18;
 
   unstable = self.nix_2_18;
 } // lib.optionalAttrs config.allowAliases {