nix: use `gomod2nix`.

flake.lock

···
         "type": "github"
       }
     },
+    "gomod2nix": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763982521,
+        "narHash": "sha256-ur4QIAHwgFc0vXiaxn5No/FuZicxBr2p0gmT54xZkUQ=",
+        "owner": "nix-community",
+        "repo": "gomod2nix",
+        "rev": "02e63a239d6eabd595db56852535992c898eba72",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "gomod2nix",
+        "type": "github"
+      }
+    },
     "nix-filter": {
       "locked": {
         "lastModified": 1757882181,
···
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
+        "gomod2nix": "gomod2nix",
         "nix-filter": "nix-filter",
         "nixpkgs": "nixpkgs"
       }

flake.nix

···
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-utils.url = "github:numtide/flake-utils";
     nix-filter.url = "github:numtide/nix-filter";
+
+    gomod2nix = {
+      url = "github:nix-community/gomod2nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.flake-utils.follows = "flake-utils";
+    };
   };
 
   outputs =
···
       nixpkgs,
       flake-utils,
       nix-filter,
-    }:
+      ...
+    }@inputs:
     flake-utils.lib.eachDefaultSystem (
       system:
       let
-        pkgs = nixpkgs.legacyPackages.${system};
+        pkgs = import nixpkgs {
+          inherit system;
+
+          overlays = [
+            inputs.gomod2nix.overlays.default
+          ];
+        };
 
-        git-pages = pkgs.buildGo125Module {
+        git-pages = pkgs.buildGoApplication {
           pname = "git-pages";
           version = "0";
 
···
             "-s -w"
           ];
 
-          vendorHash = "sha256-xG2hFc5ugJOPNCBz+GEoC7Wa5ATh86q8MrZRqs+HFUg=";
+          go = pkgs.go_1_25;
+          modules = ./gomod2nix.toml;
         };
       in
       {
···
 
           packages = with pkgs; [
             caddy
+            gomod2nix
           ];
         };
 

gomod2nix.toml

···
+schema = 3
+
+[mod]
+  [mod."codeberg.org/git-pages/go-headers"]
+    version = "v1.1.1"
+    hash = "sha256-qgL7l1FHXxcBWhBnBLEI0yENd6P+frvwlKxEAXLA3VY="
+  [mod."codeberg.org/git-pages/go-slog-syslog"]
+    version = "v0.0.0-20251207093707-892f654e80b7"
+    hash = "sha256-ye+DBIyxqTEOViYRrQPWyGJCaLmyKSDwH5btlqDPizM="
+  [mod."github.com/KimMachineGun/automemlimit"]
+    version = "v0.7.5"
+    hash = "sha256-lH/ip9j2hbYUc2W/XIYve/5TScQPZtEZe3hu76CY//k="
+  [mod."github.com/Microsoft/go-winio"]
+    version = "v0.6.2"
+    hash = "sha256-tVNWDUMILZbJvarcl/E7tpSnkn7urqgSHa2Eaka5vSU="
+  [mod."github.com/ProtonMail/go-crypto"]
+    version = "v1.3.0"
+    hash = "sha256-TUG+C4MyeWglOmiwiW2/NUVurFHXLgEPRd3X9uQ1NGI="
+  [mod."github.com/beorn7/perks"]
+    version = "v1.0.1"
+    hash = "sha256-h75GUqfwJKngCJQVE5Ao5wnO3cfKD9lSIteoLp/3xJ4="
+  [mod."github.com/c2h5oh/datasize"]
+    version = "v0.0.0-20231215233829-aa82cc1e6500"
+    hash = "sha256-8MqL7xCvE6fIjanz2jwkaLP1OE5kLu62TOcQx452DHQ="
+  [mod."github.com/cespare/xxhash/v2"]
+    version = "v2.3.0"
+    hash = "sha256-7hRlwSR+fos1kx4VZmJ/7snR7zHh8ZFKX+qqqqGcQpY="
+  [mod."github.com/cloudflare/circl"]
+    version = "v1.6.1"
+    hash = "sha256-Dc69V12eIFnJoUNmwg6VKXHfAMijbAeEVSDe8AiOaLo="
+  [mod."github.com/creasty/defaults"]
+    version = "v1.8.0"
+    hash = "sha256-I1LE1cfOhMS5JxB7+fWTKieefw2Gge1UhIZh+A6pa6s="
+  [mod."github.com/cyphar/filepath-securejoin"]
+    version = "v0.6.1"
+    hash = "sha256-obqip8c1c9mjXFznyXF8aDnpcMw7ttzv+e28anCa/v0="
+  [mod."github.com/davecgh/go-spew"]
+    version = "v1.1.1"
+    hash = "sha256-nhzSUrE1fCkN0+RL04N4h8jWmRFPPPWbCuDc7Ss0akI="
+  [mod."github.com/dghubble/trie"]
+    version = "v0.1.0"
+    hash = "sha256-hVh7uYylpMCCSPcxl70hJTmzSwaA1MxBmJFBO5Xdncc="
+  [mod."github.com/dustin/go-humanize"]
+    version = "v1.0.1"
+    hash = "sha256-yuvxYYngpfVkUg9yAmG99IUVmADTQA0tMbBXe0Fq0Mc="
+  [mod."github.com/emirpasic/gods"]
+    version = "v1.18.1"
+    hash = "sha256-hGDKddjLj+5dn2woHtXKUdd49/3xdsqnhx7VEdCu1m4="
+  [mod."github.com/fatih/color"]
+    version = "v1.18.0"
+    hash = "sha256-pP5y72FSbi4j/BjyVq/XbAOFjzNjMxZt2R/lFFxGWvY="
+  [mod."github.com/getsentry/sentry-go"]
+    version = "v0.40.0"
+    hash = "sha256-mJ+EzM8WRzJ2Yp7ithDJNceU4+GbzQyi46yc8J8d13Y="
+  [mod."github.com/getsentry/sentry-go/slog"]
+    version = "v0.40.0"
+    hash = "sha256-uc9TpKiWMEpRbxwV2uGQeq1DDdZi+APOgu2StVzzEkw="
+  [mod."github.com/go-git/gcfg/v2"]
+    version = "v2.0.2"
+    hash = "sha256-icqMDeC/tEg/3979EuEN67Ml5KjdDA0R3QvR6iLLrSI="
+  [mod."github.com/go-git/go-billy/v6"]
+    version = "v6.0.0-20251217170237-e9738f50a3cd"
+    hash = "sha256-b2yunYcPUiLTU+Rr8qTBdsDEfsIhZDYmyqKW5udmpFY="
+  [mod."github.com/go-git/go-git/v6"]
+    version = "v6.0.0-20251224103503-78aff6aa5ea9"
+    hash = "sha256-kYjDqH0NZ+sxQnj5K8xKfO2WOVKtQ/7tWcqY6KYqAZE="
+  [mod."github.com/go-ini/ini"]
+    version = "v1.67.0"
+    hash = "sha256-V10ahGNGT+NLRdKUyRg1dos5RxLBXBk1xutcnquc/+4="
+  [mod."github.com/golang/groupcache"]
+    version = "v0.0.0-20241129210726-2c02b8208cf8"
+    hash = "sha256-AdLZ3dJLe/yduoNvZiXugZxNfmwJjNQyQGsIdzYzH74="
+  [mod."github.com/google/uuid"]
+    version = "v1.6.0"
+    hash = "sha256-VWl9sqUzdOuhW0KzQlv0gwwUQClYkmZwSydHG2sALYw="
+  [mod."github.com/jpillora/backoff"]
+    version = "v1.0.0"
+    hash = "sha256-uxHg68NN8hrwPCrPfLYYprZHf7dMyEoPoF46JFx0IHU="
+  [mod."github.com/kankanreno/go-snowflake"]
+    version = "v1.2.0"
+    hash = "sha256-713xGEqjwaUGIu2EHII5sldWmcquFpxZmte/7R/O6LA="
+  [mod."github.com/kevinburke/ssh_config"]
+    version = "v1.4.0"
+    hash = "sha256-UclxB7Ll1FZCgU2SrGkiGdr4CoSRJ127MNnZtxKTsvg="
+  [mod."github.com/klauspost/compress"]
+    version = "v1.18.2"
+    hash = "sha256-mRa+6qEi5joqQao13ZFogmq67rOQzHCVbCCjKA+HKEc="
+  [mod."github.com/klauspost/cpuid/v2"]
+    version = "v2.3.0"
+    hash = "sha256-50JhbQyT67BK38HIdJihPtjV7orYp96HknI2VP7A9Yc="
+  [mod."github.com/klauspost/crc32"]
+    version = "v1.3.0"
+    hash = "sha256-RsS/MDJbVzVB+i74whqABgwZJWMw+AutF6HhJBVgbag="
+  [mod."github.com/leodido/go-syslog/v4"]
+    version = "v4.3.0"
+    hash = "sha256-fCJ2rgrrPR/Ey/PoAsJhd8Sl8mblAnnMAmBuoWFBTgg="
+  [mod."github.com/mattn/go-colorable"]
+    version = "v0.1.13"
+    hash = "sha256-qb3Qbo0CELGRIzvw7NVM1g/aayaz4Tguppk9MD2/OI8="
+  [mod."github.com/mattn/go-isatty"]
+    version = "v0.0.20"
+    hash = "sha256-qhw9hWtU5wnyFyuMbKx+7RB8ckQaFQ8D+8GKPkN3HHQ="
+  [mod."github.com/maypok86/otter/v2"]
+    version = "v2.3.0"
+    hash = "sha256-ELzmi/s2WqDeUmzSGnfx+ys2Hs28XHqF7vlEzyRotIA="
+  [mod."github.com/minio/crc64nvme"]
+    version = "v1.1.0"
+    hash = "sha256-OwlE70X91WO4HdbpGsOaB4w12Qrk0duCpfLeAskiqY8="
+  [mod."github.com/minio/md5-simd"]
+    version = "v1.1.2"
+    hash = "sha256-vykcXvy2VBBAXnJott/XsGTT0gk2UL36JzZKfJ1KAUY="
+  [mod."github.com/minio/minio-go/v7"]
+    version = "v7.0.97"
+    hash = "sha256-IwF14tWVYjBi28jUG9iFYd4Lpbc7Fvyy0zRzEZ82UEE="
+  [mod."github.com/munnerz/goautoneg"]
+    version = "v0.0.0-20191010083416-a7dc8b61c822"
+    hash = "sha256-79URDDFenmGc9JZu+5AXHToMrtTREHb3BC84b/gym9Q="
+  [mod."github.com/pbnjay/memory"]
+    version = "v0.0.0-20210728143218-7b4eea64cf58"
+    hash = "sha256-QI+F1oPLOOtwNp8+m45OOoSfYFs3QVjGzE0rFdpF/IA="
+  [mod."github.com/pelletier/go-toml/v2"]
+    version = "v2.2.4"
+    hash = "sha256-8qQIPldbsS5RO8v/FW/se3ZsAyvLzexiivzJCbGRg2Q="
+  [mod."github.com/philhofer/fwd"]
+    version = "v1.2.0"
+    hash = "sha256-cGx2/0QQay46MYGZuamFmU0TzNaFyaO+J7Ddzlr/3dI="
+  [mod."github.com/pjbgf/sha1cd"]
+    version = "v0.5.0"
+    hash = "sha256-11XBkhdciQGsQ7jEMZ6PgphRKjruTSc7ZxfOwDuPCr8="
+  [mod."github.com/pkg/errors"]
+    version = "v0.9.1"
+    hash = "sha256-mNfQtcrQmu3sNg/7IwiieKWOgFQOVVe2yXgKBpe/wZw="
+  [mod."github.com/pmezard/go-difflib"]
+    version = "v1.0.0"
+    hash = "sha256-/FtmHnaGjdvEIKAJtrUfEhV7EVo5A/eYrtdnUkuxLDA="
+  [mod."github.com/pquerna/cachecontrol"]
+    version = "v0.2.0"
+    hash = "sha256-tuTERCFfwmqPepw/rs5cyv9fArCD30BqgjZqwMV+vzQ="
+  [mod."github.com/prometheus/client_golang"]
+    version = "v1.23.2"
+    hash = "sha256-3GD4fBFa1tJu8MS4TNP6r2re2eViUE+kWUaieIOQXCg="
+  [mod."github.com/prometheus/client_model"]
+    version = "v0.6.2"
+    hash = "sha256-q6Fh6v8iNJN9ypD47LjWmx66YITa3FyRjZMRsuRTFeQ="
+  [mod."github.com/prometheus/common"]
+    version = "v0.66.1"
+    hash = "sha256-bqHPaV9IV70itx63wqwgy2PtxMN0sn5ThVxDmiD7+Tk="
+  [mod."github.com/prometheus/procfs"]
+    version = "v0.16.1"
+    hash = "sha256-OBCvKlLW2obct35p0L9Q+1ZrxZjpTmbgHMP2rng9hpo="
+  [mod."github.com/rs/xid"]
+    version = "v1.6.0"
+    hash = "sha256-rJB7h3KuH1DPp5n4dY3MiGnV1Y96A10lf5OUl+MLkzU="
+  [mod."github.com/samber/lo"]
+    version = "v1.52.0"
+    hash = "sha256-xgMsPJv3rydHH10NZU8wz/DhK2VbbR8ymivOg1ChTp0="
+  [mod."github.com/samber/slog-common"]
+    version = "v0.19.0"
+    hash = "sha256-OYXVbZML7c3mFClVy8GEnNoWW+4OfcBsxWDtKh1u7B8="
+  [mod."github.com/samber/slog-multi"]
+    version = "v1.6.0"
+    hash = "sha256-uebbTcvsBP2LdOUIjDptES+HZOXxThnIt3+FKL0qJy4="
+  [mod."github.com/sergi/go-diff"]
+    version = "v1.4.0"
+    hash = "sha256-rs9NKpv/qcQEMRg7CmxGdP4HGuFdBxlpWf9LbA9wS4k="
+  [mod."github.com/stretchr/testify"]
+    version = "v1.11.1"
+    hash = "sha256-sWfjkuKJyDllDEtnM8sb/pdLzPQmUYWYtmeWz/5suUc="
+  [mod."github.com/tinylib/msgp"]
+    version = "v1.3.0"
+    hash = "sha256-PnpndO7k5Yl036vhWJGDsrcz0jsTX8sUiTqm/D3rAVw="
+  [mod."github.com/tj/assert"]
+    version = "v0.0.3"
+    hash = "sha256-4xhmZcHpUafabaXejE9ucVnGxG/txomvKzBg6cbkusg="
+  [mod."github.com/tj/go-redirects"]
+    version = "v0.0.0-20200911105812-fd1ba1020b37"
+    hash = "sha256-GpYpxdT4F7PkwGXLo7cYVcIRJrzd1sKHtFDH+bRb6Tk="
+  [mod."github.com/valyala/bytebufferpool"]
+    version = "v1.0.0"
+    hash = "sha256-I9FPZ3kCNRB+o0dpMwBnwZ35Fj9+ThvITn8a3Jr8mAY="
+  [mod."github.com/valyala/fasttemplate"]
+    version = "v1.2.2"
+    hash = "sha256-gp+lNXE8zjO+qJDM/YbS6V43HFsYP6PKn4ux1qa5lZ0="
+  [mod."go.yaml.in/yaml/v2"]
+    version = "v2.4.2"
+    hash = "sha256-oC8RWdf1zbMYCtmR0ATy/kCkhIwPR9UqFZSMOKLVF/A="
+  [mod."golang.org/x/crypto"]
+    version = "v0.46.0"
+    hash = "sha256-I8N/spcw3/h0DFA+V1WK38HctckWIB9ep93DEVCALxU="
+  [mod."golang.org/x/net"]
+    version = "v0.48.0"
+    hash = "sha256-oZpddsiJwWCH3Aipa+XXpy7G/xHY5fEagUSok7T0bXE="
+  [mod."golang.org/x/sys"]
+    version = "v0.39.0"
+    hash = "sha256-dxTBu/JAWUkPbjFIXXRFdhQWyn+YyEpIC+tWqGo0Y6U="
+  [mod."golang.org/x/text"]
+    version = "v0.32.0"
+    hash = "sha256-9PXtWBKKY9rG4AgjSP4N+I1DhepXhy8SF/vWSIDIoWs="
+  [mod."google.golang.org/protobuf"]
+    version = "v1.36.11"
+    hash = "sha256-7W+6jntfI/awWL3JP6yQedxqP5S9o3XvPgJ2XxxsIeE="
+  [mod."gopkg.in/yaml.v3"]
+    version = "v3.0.1"
+    hash = "sha256-FqL9TKYJ0XkNwJFnq9j0VvJ5ZUU1RvH/52h/f5bkYAU="