diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f954b20..2affad3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: goto-bus-stop/setup-zig@v2
         with:
-          version: master
+          version: 0.12.0-dev.2063+804cee3b9
       - uses: actions/checkout@v3
       - run: zig fmt src/*.zig
   test:
@@ -27,7 +27,7 @@ jobs:
     steps:
       - uses: goto-bus-stop/setup-zig@v2
         with:
-          version: master
+          version: 0.12.0-dev.2063+804cee3b9
       - uses: actions/checkout@v3
       - run: zig build test
   bench:
@@ -35,6 +35,6 @@ jobs:
     steps:
       - uses: goto-bus-stop/setup-zig@v2
         with:
-          version: master
+          version: 0.12.0-dev.2063+804cee3b9
       - uses: actions/checkout@v3
       - run: zig build -Doptimize=ReleaseFast -Dcpu=baseline bench
diff --git a/build.zig b/build.zig
index 5e774a2..e78946a 100644
--- a/build.zig
+++ b/build.zig
@@ -15,7 +15,7 @@ pub fn build(b: *std.Build) void {
     // set a preferred release mode, allowing the user to decide how to optimize.
     const optimize = b.standardOptimizeOption(.{});
 
-    const hamt_module = b.addModule("hamt", .{ .source_file = .{ .path = "src/lib.zig" } });
+    const mod = b.addModule("hamt", .{ .root_source_file = .{ .path = "src/lib.zig" } });
 
     const lib = b.addStaticLibrary(.{
         .name = "hamt",
@@ -36,9 +36,9 @@ pub fn build(b: *std.Build) void {
         .name = "hamt-benchmark",
         .root_source_file = .{ .path = "src/bench.zig" },
         .target = target,
-        .optimize = optimize,
+        .optimize = .ReleaseFast,
     });
-    bench.addModule("hamt", hamt_module);
+    bench.root_module.addImport("hamt", mod);
 
     const bench_cmd = b.addRunArtifact(bench);
     const bench_step = b.step("bench", "Run benchmark");
diff --git a/build.zig.zon b/build.zig.zon
index cd579bc..46477fb 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -1,5 +1,11 @@
 .{
     .name = "hamt",
     .version = "0.1.0",
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "README.md",
+        "src",
+    },
     .dependencies = .{},
 }