diff --git a/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixos/modules/installer/tools/nix-fallback-paths.nix
index 62c292eea6dd..321fb9a2030a 100644
--- a/nixos/modules/installer/tools/nix-fallback-paths.nix
+++ b/nixos/modules/installer/tools/nix-fallback-paths.nix
@@ -1,5 +1,5 @@
 {
-  x86_64-linux = "/nix/store/xrqssm90gsrnqdn79rpfcs6dwx8597d2-nix-1.11.14";
-  i686-linux = "/nix/store/3vjphivqs2iy6m9yb3bd80nd3518510k-nix-1.11.14";
-  x86_64-darwin = "/nix/store/4j9jacx8mjd4jlj53wvymyhxq7dqyj5d-nix-1.11.14";
+  x86_64-linux = "/nix/store/b4s1gxiis1ryvybnjhdjvgc5sr1nq0ys-nix-1.11.15";
+  i686-linux = "/nix/store/kgb5hs7qw13bvb6icramv1ry9dard3h9-nix-1.11.15";
+  x86_64-darwin = "/nix/store/dgwz3dxdzs2wwd7pg7cdhvl8rv0qpnbj-nix-1.11.15";
 }
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 2192113711c7..e90f71780ebd 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -152,10 +152,10 @@ in rec {
   nix = nixStable;
 
   nixStable = (common rec {
-    name = "nix-1.11.14";
+    name = "nix-1.11.15";
     src = fetchurl {
       url = "http://nixos.org/releases/nix/${name}/${name}.tar.xz";
-      sha256 = "26593c831addf1d40f6b7d131f394cb0f9fbec9e46471369faed16eaa2c4b7e4";
+      sha256 = "d20f20e45d519f54fae5c61d55eadcf53e6d7cdbde9870eeec80d499f9805165";
     };
   }) // { perl-bindings = nixStable; };