update nixpkgs, pre-commit-hooks

the devshell no longer worked for us due to the recent deprecations :D
let's update pre-commit too because while it doesn't fail it does warn

Change-Id: Ic2060c82e4e97bb7a96cebd29097abefabdfe733

doc/manual/generate-manpage.nix

@@ -69,7 +69,7 @@ let
     let
       result = squash ''
         - ${
-          if inlineHTML then ''<span id="conf-${name}">[`${name}`](#conf-${name})</span>'' else ''`${name}`''
+          if inlineHTML then ''<span id="conf-${name}">[`${name}`](#conf-${name})</span>'' else "`${name}`"
         }
 
         ${indent "  " body}

flake.lock

@@ -106,11 +106,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1765984163,
-        "narHash": "sha256-RNFlX1Dj0DuvXkbwtglNKFxYxhwh20m/oUN0Le54UXY=",
+        "lastModified": 1769983561,
+        "narHash": "sha256-Hv7yml1x0gU14H1zxGATCXb+ueeBH7DFBUTIMkLWD4A=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e5c822e4a0e21274ec0b53bdb5c73ac3c470c263",
+        "rev": "8dcf33716a525a7a0b6815cd8d0f4fa9b13abb1b",
         "type": "github"
       },
       "original": {
@@ -123,11 +123,11 @@
     "pre-commit-hooks": {
       "flake": false,
       "locked": {
-        "lastModified": 1733318908,
-        "narHash": "sha256-SVQVsbafSM1dJ4fpgyBqLZ+Lft+jcQuMtEL3lQWx2Sk=",
+        "lastModified": 1769939035,
+        "narHash": "sha256-Fok2AmefgVA0+eprw2NDwqKkPGEI5wvR+twiZagBvrg=",
         "owner": "cachix",
         "repo": "git-hooks.nix",
-        "rev": "6f4e2a2112050951a314d2733a994fbab94864c6",
+        "rev": "a8ca480175326551d6c4121498316261cbb5b260",
         "type": "github"
       },
       "original": {

flake.nix

@@ -178,7 +178,11 @@
 
           nixVersions = prev.nixVersions // {
             # Nix 2.18 has been removed from Nixpkgs ≥ 25.05, so we need to reintroduce it ourselves for our tests.
-            nix_2_18 = nix_2_18.outputs.packages.${currentStdenv.hostPlatform.system}.default;
+            nix_2_18 =
+              nix_2_18.outputs.packages.${currentStdenv.hostPlatform.system}.default.overrideAttrs
+                (_: {
+                  pname = "nix";
+                });
           };
 
           # Forward from the previous stage as we don’t want it to pick the lowdown override

misc/pre-commit.nix

@@ -42,7 +42,7 @@ pre-commit-run {
         "file"
       ];
       excludes = [
-        ''^lix/pch/.*$''
+        "^lix/pch/.*$"
         ''\.gen\.hh$''
       ];
       pass_filenames = false; # this will automatically format everything in the stage area of Git.
@@ -110,7 +110,7 @@ pre-commit-run {
         "header"
       ];
       excludes = [
-        ''^lix/pch/.*$''
+        "^lix/pch/.*$"
         # generated files; these will never actually be seen by this
         # check, and are left here as documentation
         ''(parser|lexer)-tab\.hh$''
@@ -130,7 +130,7 @@ pre-commit-run {
       enable = true;
       stages = [ "pre-commit" ];
       excludes = [
-        ''^tests/functional/lang/''
+        "^tests/functional/lang/"
         "^tests/functional2/.+\\.exp"
         "^tests/functional2/.+\\.nix"
         ''\.patch$''