diff --git a/content/about/zig-version.md b/content/about/zig-version.md
index 94b44cc..d42f7e4 100644
--- a/content/about/zig-version.md
+++ b/content/about/zig-version.md
@@ -17,13 +17,13 @@ Download the latest supported Zig version from our pkg.machengine.org mirror:
 
 | OS/Arch                           | Kind   | Download mirror                                                                                                                         |
 | --------------------------------- | ------ | --------------------------------------------------------------------------------------------------------------------------------------- |
-| **Linux x86_64**                  | Binary | [zig-linux-x86_64-0.12.0-dev.389+61b70778b.tar.xz](https://pkg.machengine.org/zig/zig-linux-x86_64-0.12.0-dev.389+61b70778b.tar.xz)   |
-| **Linux aarch64** (ARM)           | Binary | [zig-linux-aarch64-0.12.0-dev.389+61b70778b.tar.xz](https://pkg.machengine.org/zig/zig-linux-aarch64-0.12.0-dev.389+61b70778b.tar.xz)     |
-| **Windows x86_64**                | Binary | [zig-windows-x86_64-0.12.0-dev.389+61b70778b.zip](https://pkg.machengine.org/zig/zig-windows-x86_64-0.12.0-dev.389+61b70778b.zip)     |
-| **Windows aarch64** (ARM)         | Binary | [zig-windows-aarch64-0.12.0-dev.389+61b70778b.zip](https://pkg.machengine.org/zig/zig-windows-aarch64-0.12.0-dev.389+61b70778b.zip)       |
-| **macOS x86_64** (Intel)          | Binary | [zig-macos-x86_64-0.12.0-dev.389+61b70778b.tar.xz](https://pkg.machengine.org/zig/zig-macos-x86_64-0.12.0-dev.389+61b70778b.tar.xz)   |
-| **macOS aarch64** (Apple Silicon) | Binary | [zig-macos-aarch64-0.12.0-dev.389+61b70778b.tar.xz](https://pkg.machengine.org/zig/zig-macos-aarch64-0.12.0-dev.389+61b70778b.tar.xz) |
-| Source code                       | Source | [zig-0.12.0-dev.389+61b70778b.tar.xz](https://pkg.machengine.org/zig/zig-0.12.0-dev.389+61b70778b.tar.xz)                                 |
+| **Linux x86_64**                  | Binary | [zig-linux-x86_64-0.12.0-dev.670+19a82ffdb.tar.xz](https://pkg.machengine.org/zig/zig-linux-x86_64-0.12.0-dev.670+19a82ffdb.tar.xz)   |
+| **Linux aarch64** (ARM)           | Binary | [zig-linux-aarch64-0.12.0-dev.670+19a82ffdb.tar.xz](https://pkg.machengine.org/zig/zig-linux-aarch64-0.12.0-dev.670+19a82ffdb.tar.xz)     |
+| **Windows x86_64**                | Binary | [zig-windows-x86_64-0.12.0-dev.670+19a82ffdb.zip](https://pkg.machengine.org/zig/zig-windows-x86_64-0.12.0-dev.670+19a82ffdb.zip)     |
+| **Windows aarch64** (ARM)         | Binary | [zig-windows-aarch64-0.12.0-dev.670+19a82ffdb.zip](https://pkg.machengine.org/zig/zig-windows-aarch64-0.12.0-dev.670+19a82ffdb.zip)       |
+| **macOS x86_64** (Intel)          | Binary | [zig-macos-x86_64-0.12.0-dev.670+19a82ffdb.tar.xz](https://pkg.machengine.org/zig/zig-macos-x86_64-0.12.0-dev.670+19a82ffdb.tar.xz)   |
+| **macOS aarch64** (Apple Silicon) | Binary | [zig-macos-aarch64-0.12.0-dev.670+19a82ffdb.tar.xz](https://pkg.machengine.org/zig/zig-macos-aarch64-0.12.0-dev.670+19a82ffdb.tar.xz) |
+| Source code                       | Source | [zig-0.12.0-dev.670+19a82ffdb.tar.xz](https://pkg.machengine.org/zig/zig-0.12.0-dev.670+19a82ffdb.tar.xz)                                 |
 
 _**Signatures:** `.minisig` Download signatures can be retrieved from [ziglang.org](https://ziglang.org/download/) for all downloads._
 
diff --git a/content/core/migrations/_index.md b/content/core/migrations/_index.md
index 7721010..334dcc3 100644
--- a/content/core/migrations/_index.md
+++ b/content/core/migrations/_index.md
@@ -24,7 +24,7 @@ The `module()` helper (you likely do not use this) has been replaced with a prop
 
 ## mach-core: build API improvements (2023-09-17)
 
-Zig `0.12.0-dev.389+61b70778b` is now in use (previously `0.12.0-dev.21+ac95cfe44`); and your `build.zig.zon` file no longer needs to specify transitive dependencies, and the `build.zig` API has changed slightly:
+Zig `0.12.0-dev.670+19a82ffdb` is now in use (previously `0.12.0-dev.670+19a82ffdb`); and your `build.zig.zon` file no longer needs to specify transitive dependencies, and the `build.zig` API has changed slightly:
 
 * [mach-core changes diff](https://github.com/hexops/mach-core-starter-project/commit/1bab9664f78eec5e71005fc0e341625a23995201)
 * [Other packages diff](https://github.com/hexops/machengine.org/commit/0a8723ea2be0f109348713e689467f0bf8786429)