diff --git a/.github/ci_setup_clang.sh b/.github/ci_setup_clang.sh
new file mode 100644
index 0000000..140f9f9
--- /dev/null
+++ b/.github/ci_setup_clang.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -ex
+
+VERSION=$1
+
+apt-get update
+apt-get install -y libc++-${VERSION}-dev libc++abi-${VERSION}-dev
+
+if [[ "${VERSION}" -ge 12 ]]; then
+    apt-get install -y --no-install-recommends libunwind-${VERSION}-dev
+fi
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 999c36c..b58beaa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
         if: matrix.config.compiler == 'clang'
         run: |
           if [[ "${{ matrix.config.version }}" -ge 4 ]]; then
-            scripts/ci_setup_clang.sh "${{ matrix.config.version }}"
+            .github/ci_setup_clang.sh "${{ matrix.config.version }}"
             echo "CXXFLAGS=-stdlib=libc++" >> $GITHUB_ENV
           fi
           echo "CC=clang-${{ matrix.config.version }}" >> $GITHUB_ENV
diff --git a/.gitignore b/.gitignore
index cd7a286..81dc394 100644
--- a/.gitignore
+++ b/.gitignore
@@ -200,3 +200,5 @@ Temporary Items
 
 # End of https://www.toptal.com/developers/gitignore/api/macos,clion,cmake,c++
 
+build/
+