From ad36b84762ab8fa1cbc9cf7e0989430775a88fac Mon Sep 17 00:00:00 2001
From: youfun <3973573+youfun@users.noreply.github.com>
Date: Thu, 22 Oct 2026 11:53:21 +0530
Subject: [PATCH 1/7] Pin Zig 0.17.0 and replace bufPrintZ.

0.17.0 is the stable with the macOS 26 SDK fix that 0.17.0-dev.269
was taken for. std.fmt.bufPrintZ is gone; post-mortem marker paths
use bufPrintSentinel. Companion to mob_dev and mob_new.
---
 .tool-versions            | 2 +-
 CHANGELOG.md              | 9 +++++++++
 android/jni/mob_nif.zig   | 8 ++++----
 build_system_migration.md | 5 +++++
 4 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/.tool-versions b/.tool-versions
index b3d9d31b..e6da9a5c 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
 elixir 1.20.0-otp-29
 erlang 29.1.2
-zig 0.17.0-dev.269+ebff43698
+zig 0.17.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 310e2eef..b41df149 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,16 @@ Full module documentation: [hexdocs.pm/mob](https://hexdocs.pm/mob).
 
 ## [Unreleased]
 
+### Changed
+- **Zig pin is 0.17.0.** Replaces `0.17.0-dev.269+ebff43698`. That nightly
+  existed because 0.15.x could not link on the macOS 26 SDK; 0.17.0 is the
+  stable that has the fix (`build_system_migration.md`). `mix mob.doctor`
+  still requires an exact `zig version` match, so install `0.17.0` (mise:
+  `mise install zig@0.17.0`). Companion to mob_dev and mob_new.
+
 ### Fixed
+- **Android post-mortem marker paths compile on Zig 0.17.0.** `std.fmt.bufPrintZ`
+  was removed; `mob_nif.zig` now uses `std.fmt.bufPrintSentinel`.
 - **A task killed from outside right after `start_async/3` reports the real
   reason (MOB-500).** `Mob.Screen.Server` could pass `{:exit, :noproc}` to
   `handle_async/3` when the kill landed before the screen's monitor reached
diff --git a/android/jni/mob_nif.zig b/android/jni/mob_nif.zig
index 0b0f2568..03ae934c 100644
--- a/android/jni/mob_nif.zig
+++ b/android/jni/mob_nif.zig
@@ -4898,7 +4898,7 @@ const MARKER_FILENAME = "mob_post_mortem_appexit_marker.txt";
 // Registry then dedups within the current BEAM session.
 fn readMarker(dir: []const u8) i64 {
     var path_buf: [640]u8 = @splat(0);
-    const path = std.fmt.bufPrintZ(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }) catch return 0;
+    const path = std.fmt.bufPrintSentinel(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }, 0) catch return 0;
 
     const f = jni.fopen(path.ptr, "rb") orelse return 0;
     defer _ = jni.fclose(f);
@@ -4928,7 +4928,7 @@ fn readMarker(dir: []const u8) i64 {
 // console on a permanently-failing path.
 fn writeMarker(dir: []const u8, ts_ms: i64) void {
     var path_buf: [640]u8 = @splat(0);
-    const path = std.fmt.bufPrintZ(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }) catch {
+    const path = std.fmt.bufPrintSentinel(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }, 0) catch {
         logMarkerFailureOnce(.path_too_long);
         return;
     };
@@ -4941,7 +4941,7 @@ fn writeMarker(dir: []const u8, ts_ms: i64) void {
     defer _ = jni.close(fd);
 
     var out_buf: [32]u8 = @splat(0);
-    const out = std.fmt.bufPrintZ(&out_buf, "{d}\n", .{ts_ms}) catch {
+    const out = std.fmt.bufPrintSentinel(&out_buf, "{d}\n", .{ts_ms}, 0) catch {
         logMarkerFailureOnce(.format_failed);
         return;
     };
@@ -4977,7 +4977,7 @@ fn logMarkerFailureOnce(kind: MarkerFailure) void {
     };
 
     var buf: [128]u8 = @splat(0);
-    const msg = std.fmt.bufPrintZ(&buf, "mob_post_mortem: marker write failed ({s}); cross-boot dedup will re-emit until this clears", .{reason}) catch return;
+    const msg = std.fmt.bufPrintSentinel(&buf, "mob_post_mortem: marker write failed ({s}); cross-boot dedup will re-emit until this clears", .{reason}, 0) catch return;
     jni.logWrite(jni.ANDROID_LOG_ERROR, "MobNIF", "{s}", .{msg});
 }
 
diff --git a/build_system_migration.md b/build_system_migration.md
index 3a8ed6c6..d14749bc 100644
--- a/build_system_migration.md
+++ b/build_system_migration.md
@@ -532,6 +532,11 @@ Apple framework module maps under -fmodules — Phase 1 finding).
     nightly has the fix; planning to switch to a zig stable that ships
     the macOS 26 fix when one is released (likely 0.17.0).
 
+  - 2026-10-22: Zig 0.17.0 is that stable. Pin across mob / mob_dev /
+    mob_new is `0.17.0`. `std.fmt.bufPrintZ` is gone (`bufPrintSentinel`);
+    iOS templates open `{mob_dir}/ios` with `std.Io.Dir.openDirAbsolute`
+    because `Build.build_root` was removed.
+
   - iter 1: build.zig owns driver_tab_ios.c compile.
   - iter 2: + enif_keepalive.c compile.
   - iter 3: + 5 ObjC compiles via xcrun cc system commands

From 9475be5b556e5d97e22e09b5c16aa7c2c0947085 Mon Sep 17 00:00:00 2001
From: GenericJam <genericjam@gmail.com>
Date: Fri, 23 Oct 2026 18:44:13 -0600
Subject: [PATCH 2/7] CI: set up Zig 0.17.0 (was the dev.269 nightly)

---
 .github/workflows/test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0b585653..13f7729d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -91,10 +91,10 @@ jobs:
             test/native/erts_dir_test.c \
             android/jni/mob_beam.h
 
-      - name: Android init-args tokenizer
+      - name: Set up Zig
         uses: mlugg/setup-zig@v2
         with:
-          version: 0.17.0-dev.269+ebff43698
+          version: 0.17.0
 
       - name: Android init-args and ERTS-dir tests
         run: |

From 128aea66aa3e4972d269168f7a2a53704da6dabd Mon Sep 17 00:00:00 2001
From: GenericJam <genericjam@gmail.com>
Date: Fri, 23 Oct 2026 19:10:10 -0600
Subject: [PATCH 3/7] std.mem.printSentinel; CI reads Zig from .tool-versions
 and runs :zig tests; upgrade steps

---
 .github/workflows/test.yml | 18 ++++++++++++++++--
 CHANGELOG.md               | 16 +++++++++++++---
 android/jni/mob_nif.zig    |  8 ++++----
 build_system_migration.md  |  2 +-
 issues.md                  |  8 ++++----
 5 files changed, 38 insertions(+), 14 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 13f7729d..77cb6ffa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -30,6 +30,16 @@ jobs:
           elixir-version: ${{ matrix.elixir }}
           otp-version: ${{ matrix.otp }}
 
+      # `:zig` tests (mob_nif.zig built for Android, MOB-226) need the pinned
+      # Zig; read it from .tool-versions so CI can't drift from it.
+      - name: Zig version from .tool-versions
+        id: zig
+        run: echo "version=$(awk '$1 == "zig" {print $2}' .tool-versions)" >> "$GITHUB_OUTPUT"
+
+      - uses: mlugg/setup-zig@v2
+        with:
+          version: ${{ steps.zig.outputs.version }}
+
       - name: Cache deps + _build
         uses: actions/cache@v4
         with:
@@ -91,17 +101,21 @@ jobs:
             test/native/erts_dir_test.c \
             android/jni/mob_beam.h
 
+      - name: Zig version from .tool-versions
+        id: zig
+        run: echo "version=$(awk '$1 == "zig" {print $2}' .tool-versions)" >> "$GITHUB_OUTPUT"
+
       - name: Set up Zig
         uses: mlugg/setup-zig@v2
         with:
-          version: 0.17.0
+          version: ${{ steps.zig.outputs.version }}
 
       - name: Android init-args and ERTS-dir tests
         run: |
           zig test android/jni/mob_init_args.zig
           zig test android/jni/mob_erts_dir.zig
 
-      - name: Native harness (frame registry MOB-102/MOB-103, dist port MOB-139, dist cookie MOB-348, stored queue MOB-379, init args MOB-406, node host MOB-428, code versions MOB-408)
+      - name: Native harness (frame registry MOB-102/MOB-103, dist port MOB-139, dist cookie MOB-348, stored queue MOB-379, init args MOB-406, node host MOB-428, code versions MOB-408, ERTS dir MOB-493)
         # The frame-registry check is the only automated guard on the
         # element-frame registry's ownership, generation-gating and purge rules.
         # It reproduces the algorithm rather than linking ios/mob_nif.m (which
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b41df149..44edfc53 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,12 +14,12 @@ Full module documentation: [hexdocs.pm/mob](https://hexdocs.pm/mob).
 - **Zig pin is 0.17.0.** Replaces `0.17.0-dev.269+ebff43698`. That nightly
   existed because 0.15.x could not link on the macOS 26 SDK; 0.17.0 is the
   stable that has the fix (`build_system_migration.md`). `mix mob.doctor`
-  still requires an exact `zig version` match, so install `0.17.0` (mise:
-  `mise install zig@0.17.0`). Companion to mob_dev and mob_new.
+  still requires an exact `zig version` match. Companion to mob_dev and
+  mob_new, which move with it.
 
 ### Fixed
 - **Android post-mortem marker paths compile on Zig 0.17.0.** `std.fmt.bufPrintZ`
-  was removed; `mob_nif.zig` now uses `std.fmt.bufPrintSentinel`.
+  was removed; `mob_nif.zig` now uses `std.mem.printSentinel`.
 - **A task killed from outside right after `start_async/3` reports the real
   reason (MOB-500).** `Mob.Screen.Server` could pass `{:exit, :noproc}` to
   `handle_async/3` when the kill landed before the screen's monitor reached
@@ -28,6 +28,16 @@ Full module documentation: [hexdocs.pm/mob](https://hexdocs.pm/mob).
   for `Process.exit(pid, :kill)`). Seen once in a few thousand runs of
   `async_test.exs`, next to a test-side race on the same signal ordering.
 
+### Upgrading
+- **Zig 0.17.0, with mob_dev and mob_new's matching releases.** In each
+  app, set `zig 0.17.0` in `.tool-versions` (`mise use zig@0.17.0` installs
+  it and edits the file; `mise install zig@0.17.0` alone leaves the app on
+  the nightly). iOS apps also need `ios/build.zig` and
+  `ios/build_device.zig` off `b.build_root`, which 0.17.0 removed: in the
+  Swift glob, replace `b.build_root.handle.openDir(` with
+  `std.Io.Dir.openDirAbsolute(`, or copy both files from a freshly
+  generated app. `mix mob.doctor` flags the old form.
+
 ## [0.9.25] - 2026-10-22
 
 ### Security
diff --git a/android/jni/mob_nif.zig b/android/jni/mob_nif.zig
index 03ae934c..1d3ef66a 100644
--- a/android/jni/mob_nif.zig
+++ b/android/jni/mob_nif.zig
@@ -4898,7 +4898,7 @@ const MARKER_FILENAME = "mob_post_mortem_appexit_marker.txt";
 // Registry then dedups within the current BEAM session.
 fn readMarker(dir: []const u8) i64 {
     var path_buf: [640]u8 = @splat(0);
-    const path = std.fmt.bufPrintSentinel(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }, 0) catch return 0;
+    const path = std.mem.printSentinel(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }, 0) catch return 0;
 
     const f = jni.fopen(path.ptr, "rb") orelse return 0;
     defer _ = jni.fclose(f);
@@ -4928,7 +4928,7 @@ fn readMarker(dir: []const u8) i64 {
 // console on a permanently-failing path.
 fn writeMarker(dir: []const u8, ts_ms: i64) void {
     var path_buf: [640]u8 = @splat(0);
-    const path = std.fmt.bufPrintSentinel(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }, 0) catch {
+    const path = std.mem.printSentinel(&path_buf, "{s}/{s}", .{ dir, MARKER_FILENAME }, 0) catch {
         logMarkerFailureOnce(.path_too_long);
         return;
     };
@@ -4941,7 +4941,7 @@ fn writeMarker(dir: []const u8, ts_ms: i64) void {
     defer _ = jni.close(fd);
 
     var out_buf: [32]u8 = @splat(0);
-    const out = std.fmt.bufPrintSentinel(&out_buf, "{d}\n", .{ts_ms}, 0) catch {
+    const out = std.mem.printSentinel(&out_buf, "{d}\n", .{ts_ms}, 0) catch {
         logMarkerFailureOnce(.format_failed);
         return;
     };
@@ -4977,7 +4977,7 @@ fn logMarkerFailureOnce(kind: MarkerFailure) void {
     };
 
     var buf: [128]u8 = @splat(0);
-    const msg = std.fmt.bufPrintSentinel(&buf, "mob_post_mortem: marker write failed ({s}); cross-boot dedup will re-emit until this clears", .{reason}, 0) catch return;
+    const msg = std.mem.printSentinel(&buf, "mob_post_mortem: marker write failed ({s}); cross-boot dedup will re-emit until this clears", .{reason}, 0) catch return;
     jni.logWrite(jni.ANDROID_LOG_ERROR, "MobNIF", "{s}", .{msg});
 }
 
diff --git a/build_system_migration.md b/build_system_migration.md
index d14749bc..b212e21b 100644
--- a/build_system_migration.md
+++ b/build_system_migration.md
@@ -533,7 +533,7 @@ Apple framework module maps under -fmodules — Phase 1 finding).
     the macOS 26 fix when one is released (likely 0.17.0).
 
   - 2026-10-22: Zig 0.17.0 is that stable. Pin across mob / mob_dev /
-    mob_new is `0.17.0`. `std.fmt.bufPrintZ` is gone (`bufPrintSentinel`);
+    mob_new is `0.17.0`. `std.fmt.bufPrintZ` is gone (`std.mem.printSentinel`);
     iOS templates open `{mob_dir}/ios` with `std.Io.Dir.openDirAbsolute`
     because `Build.build_root` was removed.
 
diff --git a/issues.md b/issues.md
index 04ae59e3..1f0603be 100644
--- a/issues.md
+++ b/issues.md
@@ -1030,8 +1030,8 @@ landed should drop in cleanly:
 **Why** — `:zigler ~> 0.15` resolves to `zigler 0.15.2`, which targets a
 Zig stdlib snapshot from before the `@Type` builtin signature change
 and before `std.fs.File.stdout()` was removed. The installed Zig
-(currently `0.17.0-dev.269+ebff43698`, the version mob_dev builds with)
-is past both changes.
+(then `0.17.0-dev.269+ebff43698`, the version mob_dev built with; 0.17.0
+since 2026-10-22) is past both changes.
 
 The Elixir-side scaffolding itself is correct — it emits a clean
 `use Zig, otp_app: :app` module with an example `pub fn` in a `~Z`
@@ -1043,8 +1043,8 @@ sigil. The bug is only the version pin.
    tracks Zig 0.17-dev. If a newer zigler release is compatible, bump
    the version in `MobDev.AddNif.maybe_add_zigler_dep/2`.
 
-2. **Pin Zig instead.** Mob already pins a specific Zig version via
-   `~/zig/zig-aarch64-macos-0.17.0-dev.269+ebff43698/`. If zigler 0.15
+2. **Pin Zig instead.** Mob already pins a specific Zig version (then the
+   `0.17.0-dev.269+ebff43698` nightly, now 0.17.0). If zigler 0.15
    needs an earlier Zig, document the supported range, or vendor a
    second Zig install for the zigler path.
 

From bb5d631bc0986d71557f45a1a653f9de65b92728 Mon Sep 17 00:00:00 2001
From: GenericJam <genericjam@gmail.com>
Date: Fri, 23 Oct 2026 19:22:49 -0600
Subject: [PATCH 4/7] Track the mob/ios Swift glob as a configure dependency;
 doctor and upgrade notes

---
 CHANGELOG.md | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44edfc53..378fe02c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,8 +35,11 @@ Full module documentation: [hexdocs.pm/mob](https://hexdocs.pm/mob).
   the nightly). iOS apps also need `ios/build.zig` and
   `ios/build_device.zig` off `b.build_root`, which 0.17.0 removed: in the
   Swift glob, replace `b.build_root.handle.openDir(` with
-  `std.Io.Dir.openDirAbsolute(`, or copy both files from a freshly
-  generated app. `mix mob.doctor` flags the old form.
+  `std.Io.Dir.openDirAbsolute(`, and add `b.dependOnDirectoryContents(.{
+  .cwd_relative = b.fmt("{s}/ios", .{mob_dir}) });` before it (0.17.0
+  caches the configure phase, so without it a new mob Swift file is missed).
+  Or copy the block from a freshly generated app. `mix mob.doctor` flags
+  both.
 
 ## [0.9.25] - 2026-10-22
 

From c1bfb32f2bceba0455f59db6e59eef6382a831d0 Mon Sep 17 00:00:00 2001
From: GenericJam <genericjam@gmail.com>
Date: Fri, 23 Oct 2026 19:47:20 -0600
Subject: [PATCH 5/7] Review round 3: dupeZ, doctor associates the dependency
 with mob/ios, CI lanes for the pinned Zig, test path without apostrophe

---
 .github/workflows/test.yml       | 8 +++++---
 CHANGELOG.md                     | 8 ++++++--
 android/jni/mob_stored_queue.zig | 2 +-
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 77cb6ffa..fcfb7c76 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -110,10 +110,12 @@ jobs:
         with:
           version: ${{ steps.zig.outputs.version }}
 
-      - name: Android init-args and ERTS-dir tests
+      - name: Android Zig unit tests (every file with `test` blocks)
         run: |
-          zig test android/jni/mob_init_args.zig
-          zig test android/jni/mob_erts_dir.zig
+          for f in $(grep -l '^test "' android/jni/*.zig); do
+            echo "== zig test $f"
+            zig test "$f"
+          done
 
       - name: Native harness (frame registry MOB-102/MOB-103, dist port MOB-139, dist cookie MOB-348, stored queue MOB-379, init args MOB-406, node host MOB-428, code versions MOB-408, ERTS dir MOB-493)
         # The frame-registry check is the only automated guard on the
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 378fe02c..607301c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,8 +18,12 @@ Full module documentation: [hexdocs.pm/mob](https://hexdocs.pm/mob).
   mob_new, which move with it.
 
 ### Fixed
-- **Android post-mortem marker paths compile on Zig 0.17.0.** `std.fmt.bufPrintZ`
-  was removed; `mob_nif.zig` now uses `std.mem.printSentinel`.
+- **Android Zig sources compile on Zig 0.17.0.** `std.fmt.bufPrintZ` was
+  removed, so the post-mortem marker paths in `mob_nif.zig` use
+  `std.mem.printSentinel`, and `Allocator.dupeZ` was removed, so
+  `mob_stored_queue.zig`'s tests use `dupeSentinel`. CI now sets up the
+  pinned Zig from `.tool-versions`, compiles `mob_nif.zig` for Android and
+  runs every Android Zig test file.
 - **A task killed from outside right after `start_async/3` reports the real
   reason (MOB-500).** `Mob.Screen.Server` could pass `{:exit, :noproc}` to
   `handle_async/3` when the kill landed before the screen's monitor reached
diff --git a/android/jni/mob_stored_queue.zig b/android/jni/mob_stored_queue.zig
index f02dcb95..e69b9f1a 100644
--- a/android/jni/mob_stored_queue.zig
+++ b/android/jni/mob_stored_queue.zig
@@ -105,7 +105,7 @@ pub const StoredQueue = struct {
 const testing = std.testing;
 
 fn dup(s: []const u8) ![*:0]u8 {
-    return (try testing.allocator.dupeZ(u8, s)).ptr;
+    return (try testing.allocator.dupeSentinel(u8, s, 0)).ptr;
 }
 
 fn release(s: [*:0]u8) void {

From 4d721ccf6cc3d3808d010c03e9f5086518e62e84 Mon Sep 17 00:00:00 2001
From: GenericJam <genericjam@gmail.com>
Date: Fri, 23 Oct 2026 20:00:10 -0600
Subject: [PATCH 6/7] Review nits: CI/Zig comments; zig test loop fails when it
 finds no files

---
 .github/workflows/test.yml | 4 +++-
 test/test_helper.exs       | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fcfb7c76..81bf1608 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -112,7 +112,9 @@ jobs:
 
       - name: Android Zig unit tests (every file with `test` blocks)
         run: |
-          for f in $(grep -l '^test "' android/jni/*.zig); do
+          files=$(grep -lE '^\s*test( "|\s*\{)' android/jni/*.zig)
+          [ -n "$files" ] || { echo "no Zig test files found"; exit 1; }
+          for f in $files; do
             echo "== zig test $f"
             zig test "$f"
           done
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 18aee827..da5f2b19 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -24,7 +24,7 @@
 {:ok, _} = Mob.ComponentRegistry.start_link()
 
 # `:zig` tests shell out to a real zig toolchain (MOB-226); skip where none is
-# installed (CI) rather than fail.
+# installed rather than fail. CI installs the pinned Zig, so they run there.
 zig_exclude = if System.find_executable("zig"), do: [], else: [:zig]
 
 ExUnit.start(exclude: [:onboarding, :on_device] ++ zig_exclude)

From 911e4545992983d7876d23e867a96203b50baea6 Mon Sep 17 00:00:00 2001
From: GenericJam <genericjam@gmail.com>
Date: Fri, 23 Oct 2026 20:03:45 -0600
Subject: [PATCH 7/7] CI: setup-zig without its .zig-cache cache (cached
 configure results name the old zig path)

---
 .github/workflows/test.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 81bf1608..d3adc7e5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -39,6 +39,9 @@ jobs:
       - uses: mlugg/setup-zig@v2
         with:
           version: ${{ steps.zig.outputs.version }}
+          # A cached .zig-cache holds configure results that name the zig
+          # binary by its absolute path, which changes every run.
+          use-cache: false
 
       - name: Cache deps + _build
         uses: actions/cache@v4
@@ -109,6 +112,9 @@ jobs:
         uses: mlugg/setup-zig@v2
         with:
           version: ${{ steps.zig.outputs.version }}
+          # A cached .zig-cache holds configure results that name the zig
+          # binary by its absolute path, which changes every run.
+          use-cache: false
 
       - name: Android Zig unit tests (every file with `test` blocks)
         run: |