Build failures on stable Zig 0.16.0 due to `std.Io.Threaded`

[saser]

I'm running Zig 0.16.0 stable, or at least that's what it seems like:

$ zig version
0.16.0

In a project freshly created with zig init, I take a dependency on the latest
version of this library:

$ zig fetch --save=bench https://github.com/pyk/bench/archive/main.tar.gz
...

$ cat build.zig.zon
...
    .dependencies = .{
        .bench = .{
            .url = "https://github.com/pyk/bench/archive/main.tar.gz",
            .hash = "bench-0.0.1-zrgM9kItAQBYNwZku-VWyrhSx4CDdlDsapcxjU67t8sk",
        },
    },

...

Then I add it as a dependency of the root module in build.zig:

diff --git a/build.zig b/build.zig
index 6ba0663..09de8f3 100644
--- a/build.zig
+++ b/build.zig
@@ -28,6 +28,7 @@ pub fn build(b: *std.Build) void {
     // to our consumers. We must give it a name because a Zig package can expose
     // multiple modules and consumers will need to be able to specify which
     // module they want to access.
+    const bench = b.dependency("bench", .{ .target = target, .optimize = optimize });
     const mod = b.addModule("zig_bench", .{
         // The root source file is the "entry point" of this module. Users of
         // this module will only be able to access public declarations contained
@@ -39,6 +40,9 @@ pub fn build(b: *std.Build) void {
         // Later on we'll use this module as the root module of a test executable
         // which requires us to specify a target.
         .target = target,
+        .imports = &.{
+            .{ .name = "bench", .module = bench.module("bench") },
+        },
     });

     // Here we define an executable. An executable needs to have a root module

At this point, running zig build fails, showing me an error in the build.zig of this library (so not my project's build.zig):

$ zig build
zig-pkg/bench-0.0.1-zrgM9kItAQBYNwZku-VWyrhSx4CDdlDsapcxjU67t8sk/build.zig:51:38: error: expected 2 argument(s), found 1
    var threaded: std.Io.Threaded = .init(b.allocator);
                                    ~^~~~
/usr/lib/zig/std/Io/Threaded.zig:1607:5: note: function declared here
pub fn init(
~~~~^~
referenced by:
    runBuild__anon_139970: /usr/lib/zig/std/Build.zig:2264:33
    dependencyInner__anon_139940: /usr/lib/zig/std/Build.zig:2245:29
    9 reference(s) hidden; use '-freference-trace=11' to see all references

[saser]

FWIW, I managed to get it further through the compilation process by tweaking bench's build.zig file:

--- build.zig.orig      2026-09-01 12:27:59.796929436 +0200
+++ build.zig.new       2026-09-01 12:27:46.230798429 +0200
@@ -48,11 +48,11 @@
     ///////////////////////////////////////////////////////////////////////////
     // zig build repomix - Pack repository using repomix

-    var threaded: std.Io.Threaded = .init(b.allocator);
+    var threaded: std.Io.Threaded = .init(b.allocator, .{});
     defer threaded.deinit();
     const io = threaded.io();
     const repomix_step = b.step("repomix", "Pack repository using repomix");
-    const timestamp = std.Io.Clock.Timestamp.now(io, .awake) catch @panic("failed to collect timestamp");
+    const timestamp = std.Io.Clock.Timestamp.now(io, .awake);
     const filename = b.fmt("repomix-bench-{d}.xml", .{timestamp.raw});
     const repomix_cmd = b.addSystemCommand(&.{
         "npx",

but I ran into more problems, such as Runner.zig referencing std.time.Timer which doesn't exist:

$ zig build
install
└─ install zig_bench
   └─ compile exe zig_bench Debug native 2 errors
zig-pkg/bench-0.0.1-zrgM9kItAQBYNwZku-VWyrhSx4CDdlDsapcxjU67t8sk/src/Runner.zig:5:23: error: root source file struct 'time' has no member named 'Timer'
const Timer = std.time.Timer;
              ~~~~~~~~^~~~~~
/usr/lib/zig/std/time.zig:1:1: note: struct declared here
pub const epoch = @import("time/epoch.zig");
^~~
referenced by:
    run__anon_32693: zig-pkg/bench-0.0.1-zrgM9kItAQBYNwZku-VWyrhSx4CDdlDsapcxjU67t8sk/src/Runner.zig:33:21
    main: src/main.zig:27:34
    5 reference(s) hidden; use '-freference-trace=7' to see all references

All in all I think this just means that the library does not support my version of Zig, aka 0.16.0? I'm not sure, I only installed Zig the other day to start playing with it.