diff --git a/dockerfiles/ci/bookworm/Dockerfile b/dockerfiles/ci/bookworm/Dockerfile
index eab606056f3..90a85bdb24b 100644
--- a/dockerfiles/ci/bookworm/Dockerfile
+++ b/dockerfiles/ci/bookworm/Dockerfile
@@ -68,8 +68,6 @@ ENV PHPIZE_DEPS \
     clang-17 \
     cmake \
     dpkg-dev \
-    g++ \
-    gcc \
     file \
     lcov \
     libc-dev \
@@ -128,7 +126,17 @@ RUN set -eux; \
         echo 'Defaults    env_keep += "DEBIAN_FRONTEND"' >> /etc/sudoers.d/env_keep; \
     \
 # Allow nginx to be run as non-root for tests
-    chown -R circleci:circleci /var/log/nginx/ /var/lib/nginx/;
+    chown -R circleci:circleci /var/log/nginx/ /var/lib/nginx/; \
+    \
+# Make clang the default compiler
+    update-alternatives --install /usr/bin/cc cc /usr/bin/clang-17 100; \
+    update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++-17 100; \
+    update-alternatives --install /usr/bin/clang clang /usr/bin/clang-17 100; \
+    update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-17 100; \
+    update-alternatives --install /usr/bin/ld ld /usr/bin/ld.lld-17 100; \
+    echo "-L /usr/lib/llvm-17/lib/clang/17/lib/linux" > /usr/lib/llvm-17/bin/clang.cfg; \
+# Include libasan library path
+    echo /usr/lib/llvm-17/lib/clang/17/lib/linux > /etc/ld.so.conf.d/libasan.conf && ldconfig
 
 # Install SqlServer PHP Driver
 # https://learn.microsoft.com/en-us/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server
diff --git a/dockerfiles/ci/bookworm/build-extensions.sh b/dockerfiles/ci/bookworm/build-extensions.sh
index 01328c10c5e..6a3f123ade3 100755
--- a/dockerfiles/ci/bookworm/build-extensions.sh
+++ b/dockerfiles/ci/bookworm/build-extensions.sh
@@ -6,6 +6,9 @@ SHARED_BUILD=$(if php -i | grep -q enable-pcntl=shared; then echo 1; else echo 0
 PHP_VERSION_ID=$(php -r 'echo PHP_MAJOR_VERSION . PHP_MINOR_VERSION;')
 PHP_ZTS=$(php -r 'echo PHP_ZTS;')
 
+# This make `pecl install` use all available cores
+export MAKEFLAGS="-j $(nproc)"
+
 XDEBUG_VERSIONS=(-3.1.2)
 if [[ $PHP_VERSION_ID -le 70 ]]; then
   XDEBUG_VERSIONS=(-2.7.2)
@@ -56,8 +59,8 @@ fi
 HOST_ARCH=$(if [[ $(file $(readlink -f $(which php))) == *aarch64* ]]; then echo "aarch64"; else echo "x86_64"; fi)
 
 export PKG_CONFIG=/usr/bin/$HOST_ARCH-linux-gnu-pkg-config
-export CC=$HOST_ARCH-linux-gnu-gcc
-export CXX=$HOST_ARCH-linux-gnu-g++
+# export CC=$HOST_ARCH-linux-gnu-gcc
+# export CXX=$HOST_ARCH-linux-gnu-g++
 
 iniDir=$(php -i | awk -F"=> " '/Scan this dir for additional .ini files/ {print $2}');
 
diff --git a/dockerfiles/ci/bookworm/build-php.sh b/dockerfiles/ci/bookworm/build-php.sh
index a15800e999b..909745c5471 100755
--- a/dockerfiles/ci/bookworm/build-php.sh
+++ b/dockerfiles/ci/bookworm/build-php.sh
@@ -13,7 +13,8 @@ INSTALL_DIR=$BASE_INSTALL_DIR/$INSTALL_VERSION
 
 if [[ ${INSTALL_VERSION} == *asan* ]]; then
   export CFLAGS='-fsanitize=address -DZEND_TRACK_ARENA_ALLOC'
-  export LDFLAGS='-fsanitize=address'
+  # GCC has `-shared-libasan` default, clang has '-static-libasan' default
+  export LDFLAGS='-fsanitize=address -shared-libasan'
 fi
 
 mkdir -p /tmp/build-php && cd /tmp/build-php
@@ -23,7 +24,7 @@ mkdir -p ${INSTALL_DIR}/conf.d
 HOST_ARCH=$(if [[ $TARGETPLATFORM == "linux/arm64" ]]; then echo "aarch64"; else echo "x86_64"; fi)
 
 PKG_CONFIG=/usr/bin/$HOST_ARCH-linux-gnu-pkg-config \
-CC=$HOST_ARCH-linux-gnu-gcc \
+# CC=$HOST_ARCH-linux-gnu-gcc \
 LIBS=-ldl \
 ${PHP_SRC_DIR}/configure \
     $(if [[ $SHARED_BUILD -ne 0 ]]; then echo \