diff --git a/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixos/modules/installer/tools/nix-fallback-paths.nix
index f6f99b6218d28..68f6494510cb2 100644
--- a/nixos/modules/installer/tools/nix-fallback-paths.nix
+++ b/nixos/modules/installer/tools/nix-fallback-paths.nix
@@ -1,8 +1,8 @@
 {
-  x86_64-linux = "/nix/store/x30lnlgk1s16rynrfslbf8phr6h6rqf2-nix-2.31.2";
-  i686-linux = "/nix/store/ix94q6rrdg6cr4893cjpzdbmibhlm0dv-nix-2.31.2";
-  aarch64-linux = "/nix/store/xnybj9lk0kwvmr2va253avanq7m3cpyg-nix-2.31.2";
-  riscv64-linux = "/nix/store/33as1vqp8mq36nr5bb5gr7ziw1nf4q1v-nix-riscv64-unknown-linux-gnu-2.31.2";
-  x86_64-darwin = "/nix/store/b9dvary8rcljj7ajv1x64hwwch4cvyvp-nix-2.31.2";
-  aarch64-darwin = "/nix/store/lvv1j8qbrvlnl3aagcjrhf42d458zgb5-nix-2.31.2";
+  x86_64-linux = "/nix/store/mxn3vxpvk2b42kgd08aw4bn27qhf434w-nix-2.31.3";
+  i686-linux = "/nix/store/b7d35ifww9683l74ydkb0qhrq6lqcisi-nix-2.31.3";
+  aarch64-linux = "/nix/store/ysz7dwmy4zd1zm3wzx5dh9g999xv7pbm-nix-2.31.3";
+  riscv64-linux = "/nix/store/avfv2lqbnphj2ap8y5ihg1l0sqhpjll7-nix-riscv64-unknown-linux-gnu-2.31.3";
+  x86_64-darwin = "/nix/store/s8lcl6nrd5ia7nr4zx9mg720i9f8qm37-nix-2.31.3";
+  aarch64-darwin = "/nix/store/vfjzbcl3kf9jjwh0g2x03cvz2x5hg8py-nix-2.31.3";
 }
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index b63f6d4d33d06..f9e53596053c4 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -167,34 +167,17 @@ lib.makeExtensible (
 
       nix_2_30 = addTests "nix_2_30" self.nixComponents_2_30.nix-everything;
 
-      nixComponents_2_31 =
-        (nixDependencies.callPackage ./modular/packages.nix rec {
-          version = "2.31.2";
-          inherit (self.nix_2_30.meta) teams;
-          otherSplices = generateSplicesForNixComponents "nixComponents_2_31";
-          src = fetchFromGitHub {
-            owner = "NixOS";
-            repo = "nix";
-            tag = version;
-            hash = "sha256-NLGXPLjENLeKVOg3OZgHXZ+1x6sPIKq9FHH8pxbCrDI=";
-          };
-        }).appendPatches
-          (
-            [
-              (fetchpatch2 {
-                name = "nix-2.31-14692-mdbook-0.5-support.patch";
-                url = "https://github.com/NixOS/nix/commit/a4f5f365090980a6eeb2ef483e49c04bdefd71a8.patch";
-                hash = "sha256-GOWZtHSzHovnD8iUknr61bo7y85i0BKdw3kVBGDfBX0=";
-              })
-            ]
-            ++
-              # issues on darwin: https://github.com/NixOS/nixpkgs/pull/468208#issuecomment-3626314109
-              lib.optional stdenv.isLinux (fetchpatch2 {
-                name = "nix-2.31-14240-sri-error-message.patch";
-                url = "https://github.com/NixOS/nix/commit/56751b1cd2c4700c71c545f2246adf602c97fdf5.patch";
-                hash = "sha256-CerSBAI+H2RqPp9jsCP0QIM2rZYx3yBZHVVUAztgc18=";
-              })
-          );
+      nixComponents_2_31 = nixDependencies.callPackage ./modular/packages.nix rec {
+        version = "2.31.3";
+        inherit (self.nix_2_30.meta) teams;
+        otherSplices = generateSplicesForNixComponents "nixComponents_2_31";
+        src = fetchFromGitHub {
+          owner = "NixOS";
+          repo = "nix";
+          tag = version;
+          hash = "sha256-oe0YWe8f+pwQH4aYD2XXLW5iEHyXNUddurqJ5CUVCIk=";
+        };
+      };
 
       nix_2_31 = addTests "nix_2_31" self.nixComponents_2_31.nix-everything;