diff --git a/.github/actions/ci-shared-setup/action.yml b/.github/actions/ci-shared-setup/action.yml
index 90ab7cc2..ea19f1be 100644
--- a/.github/actions/ci-shared-setup/action.yml
+++ b/.github/actions/ci-shared-setup/action.yml
@@ -1,9 +1,5 @@
 name: "Shared CI setup"
 description: "Common setup for CI pipeline workflow jobs"
-inputs:
-  os:
-    description: "The operating system for downloading binaries"
-    required: true
 runs:
   using: "composite"
   steps:
@@ -11,19 +7,19 @@ runs:
       uses: actions/cache@v3
       with:
         path: ~/.cargo
-        key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.toml') }}
+        key: cargo-${{ hashFiles('Cargo.toml') }}
         restore-keys: |
-          ${{ runner.os }}-cargo-${{ hashFiles('Cargo.toml') }}
-          ${{ runner.os }}-cargo
+          cargo-${{ hashFiles('Cargo.toml') }}
+          cargo
 
     - name: Cargo Target Cache
       uses: actions/cache@v3
       with:
         path: target
-        key: ${{ runner.os }}-cargo-target-${{ hashFiles('Cargo.toml') }}
+        key: cargo-target-${{ hashFiles('Cargo.toml') }}
         restore-keys: |
-          ${{ runner.os }}-cargo-target-${{ hashFiles('Cargo.toml') }}
-          ${{ runner.os }}-cargo-target
+          cargo-target-${{ hashFiles('Cargo.toml') }}
+          cargo-target
 
     - name: Read wasmtime version
       id: wasmtime_version
@@ -35,7 +31,7 @@ runs:
     - name: Install wasmtime-cli
       shell: bash
       run: |
-        wget -nv 'https://github.com/bytecodealliance/wasmtime/releases/download/v${{ steps.wasmtime_version.outputs.wasmtime_version }}/wasmtime-v${{ steps.wasmtime_version.outputs.wasmtime_version }}-x86_64-${{ inputs.os }}.tar.xz' -O /tmp/wasmtime.tar.xz
+        wget -nv 'https://github.com/bytecodealliance/wasmtime/releases/download/v${{ steps.wasmtime_version.outputs.wasmtime_version }}/wasmtime-v${{ steps.wasmtime_version.outputs.wasmtime_version }}-x86_64-linux.tar.xz' -O /tmp/wasmtime.tar.xz
         mkdir /tmp/wasmtime
         tar xvf /tmp/wasmtime.tar.xz --strip-components=1 -C /tmp/wasmtime
         echo "/tmp/wasmtime" >> $GITHUB_PATH
diff --git a/.github/workflows/build-assets.yml b/.github/workflows/build-assets.yml
index 5ccdc4a5..3b145c21 100644
--- a/.github/workflows/build-assets.yml
+++ b/.github/workflows/build-assets.yml
@@ -20,7 +20,7 @@ on:
 jobs:
   compile_plugin:
     name: compile_plugin
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 
@@ -34,7 +34,7 @@ jobs:
       - name: Install wizer
         shell: bash
         run: |
-          wget -nv https://github.com/bytecodealliance/wizer/releases/download/v${{ steps.wizer_version.outputs.WIZER_VERSION }}/wizer-v${{ steps.wizer_version.outputs.WIZER_VERSION }}-x86_64-macos.tar.xz -O /tmp/wizer.tar.xz
+          wget -nv https://github.com/bytecodealliance/wizer/releases/download/v${{ steps.wizer_version.outputs.WIZER_VERSION }}/wizer-v${{ steps.wizer_version.outputs.WIZER_VERSION }}-x86_64-linux.tar.xz -O /tmp/wizer.tar.xz
           mkdir /tmp/wizer
           tar xvf /tmp/wizer.tar.xz --strip-components=1 -C /tmp/wizer
           echo "/tmp/wizer" >> $GITHUB_PATH
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 10c2c015..15e7c11d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,20 +9,13 @@ on:
 jobs:
   plugin:
     name: test_plugin
-    # We test on `macos-latest` to accurately reflect
-    # the plugin Wasm binary that we attach to the releases,
-    # which is built on the latest macOS too.
-    # This is also helpful for testing fuel
-    # consumption in tests.
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: true
 
       - uses: ./.github/actions/ci-shared-setup
-        with:
-          os: macos
 
       - name: Install cargo-hack
         uses: taiki-e/install-action@cargo-hack
@@ -65,8 +58,6 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: ./.github/actions/ci-shared-setup
-        with:
-          os: linux
 
       - uses: actions/download-artifact@v4
         with:
diff --git a/.github/workflows/cli-features.yml b/.github/workflows/cli-features.yml
index 98d41e8d..b2f25d6a 100644
--- a/.github/workflows/cli-features.yml
+++ b/.github/workflows/cli-features.yml
@@ -14,13 +14,13 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: ./.github/actions/ci-shared-setup
-        with:
-          os: linux
 
       - name: Build test-plugin
+        # Need to build Javy default plugin and Javy CLI to run `javy init-plugin` on the test plugin.
         run: |
-          cargo build --package=javy-test-plugin --release --target=wasm32-wasip1
+          cargo build --package=javy-plugin --release --target=wasm32-wasip1
           CARGO_PROFILE_RELEASE_LTO=off cargo build --package=javy-cli --release
+          cargo build --package=javy-test-plugin --release --target=wasm32-wasip1
           target/release/javy init-plugin target/wasm32-wasip1/release/test_plugin.wasm -o crates/runner/test_plugin.wasm
 
       - name: Test `experimental_event_loop`
diff --git a/.github/workflows/wpt.yml b/.github/workflows/wpt.yml
index 46b8e6ab..b126bcc2 100644
--- a/.github/workflows/wpt.yml
+++ b/.github/workflows/wpt.yml
@@ -16,8 +16,6 @@ jobs:
           submodules: true
 
       - uses: ./.github/actions/ci-shared-setup
-        with:
-          os: linux
 
       - name: WPT
         run: |