diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
index e24cffec..aa618a77 100644
--- a/.github/actions/build/action.yml
+++ b/.github/actions/build/action.yml
@@ -14,39 +14,30 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - name: Install brew packages
-      working-directory: ${{ github.workspace }}/compiler+runtime
-      shell: bash
-      run: |
-        if [[ "$OSTYPE" == "linux"* ]]; then
-          eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
-          sudo apt-get install -y libzip-dev libbz2-dev libgc-dev
-        fi
-        HOMEBREW_NO_AUTO_UPDATE=1 brew install ninja libzip doctest boost llvm@19 double-conversion bdw-gc clang-format
-
     - name: Compile and test
       shell: bash
       working-directory: ${{ github.workspace }}/compiler+runtime
       run: |
-        if [[ "$OSTYPE" == "darwin"* ]]; then
-            export SDKROOT=$(xcrun --sdk macosx --show-sdk-path)
-        fi
+        ./bin/ci/test
+        # if [[ "$OSTYPE" == "darwin"* ]]; then
+        #     export SDKROOT=$(xcrun --sdk macosx --show-sdk-path)
+        # fi
 
-        if [[ "$OSTYPE" == "linux"* ]]; then
-          eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
-        fi
+        # if [[ "$OSTYPE" == "linux"* ]]; then
+        #   eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+        # fi
 
-        export PATH="$(brew --prefix)/opt/llvm/bin:${PATH}"
-        export LDFLAGS="-Wl,-rpath,$(brew --prefix)/opt/llvm/lib ${LDFLAGS}"
-        export CPPFLAGS="-I$(brew --prefix)/opt/llvm/include ${CPPFLAGS}"
+        # export PATH="$(brew --prefix)/opt/llvm/bin:${PATH}"
+        # export LDFLAGS="-Wl,-rpath,$(brew --prefix)/opt/llvm/lib ${LDFLAGS}"
+        # export CPPFLAGS="-I$(brew --prefix)/opt/llvm/include ${CPPFLAGS}"
 
-        ${{ github.workspace }}/compiler+runtime/bin/configure -GNinja \
-                                                               -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} #\
-                                                               #-Djank_tests=on \
-                                                               # -Djank_analysis="${ANALYSIS:-off}" \
-                                                               # -Djank_coverage="${COVERAGE:-off}"
+        # ${{ github.workspace }}/compiler+runtime/bin/configure -GNinja \
+        #                                                        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} #\
+        #                                                        #-Djank_tests=on \
+        #                                                        # -Djank_analysis="${ANALYSIS:-off}" \
+        #                                                        # -Djank_coverage="${COVERAGE:-off}"
 
-        ${{ github.workspace }}/compiler+runtime/bin/compile
+        # ${{ github.workspace }}/compiler+runtime/bin/compile
         # ${{ github.workspace }}/compiler+runtime/bin/test
         # LLVM_PROFILE_FILE=build/test.profraw ./bin/test
         # llvm-profdata merge --sparse build/test.profraw -o build/test.profdata
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index da0e444d..8c9ce44a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,33 +5,51 @@ on:
   push:
 
 jobs:
-  test:
+  linux:
+    strategy:
+      matrix:
+        build_type: [ Debug, Release ]
+    runs-on: ubuntu-latest
+    container: ubuntu:24.10
+    env:
+      CC: clang-19
+      CXX: clang++-19
+    timeout-minutes: 240
+    steps:
+      - name: Install deps
+        run: apt update && apt install -y git git-lfs sudo build-essential libzip-dev libbz2-dev libgc-dev clang-19 libboost-all-dev ninja-build doctest-dev cmake libllvmlibc-19-dev libclang-19-dev libssl-dev
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Build and test
+        uses: ./.github/actions/build
+        id: build
+        with:
+          update_release: ${{ github.ref == 'refs/heads/main' && matrix.build_type == 'Release' }}
+      - name: Update latest release
+        if: success() && github.ref == 'refs/heads/main' && ${{ matrix.build_type == 'Release' }}
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: latest
+          token: ${{ secrets.GITHUB_TOKEN }}
+          files: ${{ steps.build.outputs.release_archive }}
+
+  macos:
     strategy:
       fail-fast: false
       matrix:
-        # TODO: sanitize: [On, Off]
-        os: [ macos-15]
+        os: [ macos-13, macos-15 ]
         # TODO: Enable release once we no longer have a Clang crash:
         # https://github.com/jank-lang/jank/actions/runs/12269972895/job/34234432107
-        build_type: [Debug]
-        include:
-          - os: ubuntu-24.04
-            cc: clang
-            cxx: clang++
-          - os: macos-13
-            cc: clang
-            cxx: clang++
-          - os: macos-15
-            cc: clang
-            cxx: clang++
+        build_type: [Debug, Release]
     runs-on: ${{ matrix.os }}
     env:
-      CC: ${{ matrix.cc }}
-      CXX: ${{ matrix.cxx }}
-      CODECOV: ${{ matrix.codecov }}
-      ANALYSIS: ${{ matrix.analysis }}
+      CC: clang
+      CXX: clang++
     timeout-minutes: 240 # 4h
     steps:
+      - name: Install dependencies
+        run: HOMEBREW_NO_AUTO_UPDATE=1 brew install ninja libzip doctest boost llvm@19 double-conversion bdw-gc clang-format
       - uses: actions/checkout@v4
         with:
           submodules: recursive
diff --git a/compiler+runtime/bin/ci/test b/compiler+runtime/bin/ci/test
index 25f797cf..47293ad3 100755
--- a/compiler+runtime/bin/ci/test
+++ b/compiler+runtime/bin/ci/test
@@ -1,20 +1,30 @@
 #!/usr/bin/env bash
 
-set -eu
+set -e
+if [[ "$OSTYPE" == "darwin"* ]];
+then
+    export SDKROOT=$(xcrun --sdk macosx --show-sdk-path)
+    export PATH="$(brew --prefix)/opt/llvm/bin:${PATH}"
+    export LDFLAGS="-Wl,-rpath,$(brew --prefix)/opt/llvm/lib ${LDFLAGS}"
+    export CPPFLAGS="-I$(brew --prefix)/opt/llvm/include ${CPPFLAGS}"
+fi
 
-llvm_dir="${PWD}/build/llvm-install"
-if [[ ! -d "${llvm_dir}" ]];
+if [[ "${BUILD_LLVM:-off}" == "on" ]];
 then
-  mkdir -p build
-  pushd build
-    ../bin/build-clang
-  popd
+    llvm_dir="${PWD}/build/llvm-install"
+    if [[ ! -d "${llvm_dir}" ]];
+    then
+        mkdir -p build
+        pushd build
+        ../bin/build-clang
+        popd
+    fi
+    export CC="${llvm_dir}/usr/local/bin/clang"
+    export CXX="${llvm_dir}/usr/local/bin/clang++"
 fi
-export CC="${llvm_dir}/usr/local/bin/clang"
-export CXX="${llvm_dir}/usr/local/bin/clang++"
 
 ./bin/configure -GNinja \
-                -Djank_local_clang=on \
+                -Djank_local_clang="${BUILD_LLVM:-off}" \
                 -Djank_tests=on \
                 -Djank_analysis="${ANALYSIS:-off}" \
                 "$@"
@@ -29,8 +39,8 @@ then
                   -Djank_analysis=off \
                   "$@"
   LLVM_PROFILE_FILE=build/test.profraw ./bin/test
-  "${llvm_dir}/usr/local/bin/llvm-profdata" merge --sparse build/test.profraw -o build/test.profdata
-  "${llvm_dir}/usr/local/bin/llvm-cov" show ./build/jank-test --instr-profile build/test.profdata > coverage.txt
+  "${llvm_dir:-/}/usr/local/bin/llvm-profdata" merge --sparse build/test.profraw -o build/test.profdata
+  "${llvm_dir:-/}/usr/local/bin/llvm-cov" show ./build/jank-test --instr-profile build/test.profdata > coverage.txt
   # This file will be read by a subsequent CodeCov Github action.
 else
   ./bin/test