Better handle Zig dependency on CI

.github/workflows/ci.yml

@@ -15,10 +15,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up Zig
-        uses: goto-bus-stop/setup-zig@v2
-        with:
-          version: master
       - name: Build and test
         run: sh ci/linux_gnu_runner.sh
   macos:
@@ -27,9 +23,5 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up Zig
-        uses: davidgm94/setup-zig@foo
-        with:
-          version: master
       - name: Build and test
         run: sh ci/macos_runner.sh

ci/linux_gnu_runner.sh

@@ -1,10 +1,17 @@
 #!/bin/sh
 set -ex
 
+# Install LLVM and system dependencies
 wget https://apt.llvm.org/llvm.sh
 chmod +x llvm.sh
 sudo ./llvm.sh 17 all
-
 sudo apt install liblld-17-dev libclang-17-dev liblld-17 ninja-build cmake -y
 
-zig build test -Dthird_party_ci=true
+# Install Zig
+ZIG_VERSION=0.12.0
+ZIG_PACKAGE_NAME=zig-linux-x86_64-$ZIG_VERSION
+wget https://ziglang.org/download/$ZIG_VERSION/$ZIG_PACKAGE_NAME.tar.xz
+tar xf $ZIG_PACKAGE_NAME.tar.xz
+
+# Build and test
+$ZIG_PACKAGE_NAME/zig build test -Dthird_party_ci=true

ci/macos_runner.sh

@@ -1,5 +1,15 @@
 #!/bin/sh
 set -ex
+
+# Install LLVM and system dependencies
 brew update
 brew install llvm@17 ninja
-zig build test -Dthird_party_ci
+
+# Install Zig
+ZIG_VERSION=0.12.0
+ZIG_PACKAGE_NAME=zig-macos-aarch64-$ZIG_VERSION
+wget https://ziglang.org/download/$ZIG_VERSION/$ZIG_PACKAGE_NAME.tar.xz
+tar xf $ZIG_PACKAGE_NAME.tar.xz
+
+# Build and test
+$ZIG_PACKAGE_NAME/zig build test -Dthird_party_ci=true