ztags: 1.0.1 -> 1.0.1-unstable-2026-04-23, zig_0_13 -> zig_0_16

diff: https://github.com/gpanders/ztags/compare/v1.0.1...49d45d0db73c6e5705853bfdb25a471d19538993

zig 0.13 will soon be removed from nixpkgs as it depends on llvm 18.
ztags needs to be updated to a newer zig version, and has been upstream
without a release. accordingly, we update to the latest upstream commit
in order to get support for zig 0.16. the resulting binaries still seem
to work, e.g. to index the standard library as described in the README.

also, we switch to codeberg instead of github as the man page mentions
codeberg under the # CONTRIBUTE section, while it does not do the same
for github: 49d45d0db7/ztags.1.scd.
the README still mentions both.

pkgs/by-name/zt/ztags/deps.nix

@@ -0,0 +1,14 @@
+# generated by zon2nix (https://github.com/nix-community/zon2nix)
+
+{ linkFarm, fetchgit }:
+
+linkFarm "zig-packages" [
+  {
+    name = "zzdoc-0.0.0-tzT1PjPfAAD6wsVuNRwwCStXJC5la08OkS3u4ra7fHpM";
+    path = fetchgit {
+      url = "https://github.com/rockorager/zzdoc";
+      rev = "98cdf8ba5ae2d01b4da0793dd43dd2f6d6b1e217";
+      hash = "sha256-34FtjraFGbA+QcwiBolpFQoma1bscup/3+4RgkXVJEg=";
+    };
+  }
+]

pkgs/by-name/zt/ztags/package.nix

@@ -1,37 +1,37 @@
 {
   lib,
   stdenv,
-  fetchFromGitHub,
-  scdoc,
-  zig_0_13,
+  callPackage,
+  fetchFromCodeberg,
+  zig_0_16,
 }:
 
 let
-  zig = zig_0_13;
+  zig = zig_0_16;
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "ztags";
-  version = "1.0.1";
+  version = "1.0.1-unstable-2026-04-23";
 
-  src = fetchFromGitHub {
+  src = fetchFromCodeberg {
     owner = "gpanders";
     repo = "ztags";
-    rev = "v${finalAttrs.version}";
-    hash = "sha256-XDwHuQ+UwScolxyxCHJUmxxG+OgKvZmNGQEZlfywV2s=";
+    rev = "49d45d0db73c6e5705853bfdb25a471d19538993";
+    hash = "sha256-RawMttAMlRj2ofXmtgeCl/g8XxyUZjXg22heHYRpJy8=";
   };
 
-  nativeBuildInputs = [
-    scdoc
-    zig
-  ];
+  deps = callPackage ./deps.nix { };
 
-  postInstall = ''
-    zig build docs --prefix $out
-  '';
+  nativeBuildInputs = [ zig ];
+
+  zigBuildFlags = [
+    "--system"
+    "${finalAttrs.deps}"
+  ];
 
   meta = {
     description = "Generate tags files for Zig projects";
-    homepage = "https://github.com/gpanders/ztags";
+    homepage = "https://codeberg.org/gpanders/ztags";
     license = lib.licenses.mit;
     maintainers = [ ];
     mainProgram = "ztags";