diff --git a/Dockerfile b/Dockerfile
index ad2f0e6..2ddea8c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,7 +43,7 @@ ENV CC="$C_COMPILER"
 ENV CXX="$CXX_COMPILER"
 
 # Install b2 using Conan
-RUN printf '[requires]\nb2/4.10.1\n[options]\nb2*:toolset=%s' \
+RUN printf '[requires]\nb2/5.2.1\n[options]\nb2*:toolset=%s' \
            "$(basename "$(which "$CC")")" | cut -f 1 -d - > /tmp/conanfile.txt
 
 RUN conan install /tmp/conanfile.txt                 \
@@ -92,6 +92,7 @@ RUN cmake -DCMAKE_BUILD_TYPE=Release            \
           -DCMAKE_PREFIX_PATH="$build_dir"      \
           -DENABLE_DEVELOPER_MODE=OFF           \
           -DCMAKE_INSTALL_PREFIX="$staging_dir" \
+          -DNCHG_ENABLE_TESTING=OFF             \
           -DGIT_RETRIEVED_STATE=true            \
           -DGIT_TAG="$GIT_TAG"                  \
           -DGIT_IS_DIRTY="$GIT_IS_DIRTY"        \
@@ -103,7 +104,7 @@ RUN cmake -DCMAKE_BUILD_TYPE=Release            \
 
 # Build and install project
 RUN cmake --build "$build_dir" -t NCHG -j "$(nproc)"  \
-&& cmake --install "$build_dir" --component Runtime \
+&& cmake --install "$build_dir" --component Runtime   \
 && rm -rf "$build_dir/include" "$build_dir/lib"
 
 ARG FINAL_BASE_IMAGE
diff --git a/src/nchg/include/nchg/tools/common.hpp b/src/nchg/include/nchg/tools/common.hpp
index dc30e43..bcb8d78 100644
--- a/src/nchg/include/nchg/tools/common.hpp
+++ b/src/nchg/include/nchg/tools/common.hpp
@@ -26,7 +26,12 @@
 
 namespace nchg {
 namespace internal {
+
+#ifdef __cpp_lib_constexpr_string
 [[nodiscard]] constexpr std::string strip_leading_zero(std::string s) {
+#else
+[[nodiscard]] inline std::string strip_leading_zero(std::string s) {
+#endif
   if (s.front() != '0') {
     return s;
   }
@@ -35,7 +40,11 @@ namespace internal {
 }  // namespace internal
 
 template <typename Duration>
+#ifdef __cpp_lib_constexpr_string
 [[nodiscard]] constexpr std::string format_duration(const Duration& duration) {
+#else
+[[nodiscard]] inline std::string format_duration(const Duration& duration) {
+#endif
   if (duration < std::chrono::microseconds(1)) {
     return fmt::to_string(std::chrono::duration_cast<std::chrono::nanoseconds>(duration));
   }
diff --git a/utils/devel/build_dockerfile.sh b/utils/devel/build_dockerfile.sh
index a453b62..ee98678 100755
--- a/utils/devel/build_dockerfile.sh
+++ b/utils/devel/build_dockerfile.sh
@@ -24,10 +24,16 @@ set -o pipefail
 
 IMAGE_NAME='nchg'
 
+if [ "$(uname)" == "Darwin" ]; then
+  BUILD_USER="$USER"
+else
+  BUILD_USER='root'
+fi
+
 GIT_HASH="$(git rev-parse HEAD)"
 GIT_SHORT_HASH="$(git rev-parse --short HEAD)"
-GIT_TAG="$(git for-each-ref 'refs/tags/v*.*.*' --count 1 --sort=-v:refname --format "%(refname:short)"  --points-at HEAD)"
-CREATION_DATE="$(date --iso-8601)"
+GIT_TAG="$(git for-each-ref 'refs/tags/v*.*.*' --count 1 --sort=-v:refname --format "%(refname:short)" --points-at HEAD)"
+CREATION_DATE="$(date -I)"
 
 if [[ $(git status --porcelain -uno) ]]; then
   GIT_IS_DIRTY=1
@@ -48,21 +54,21 @@ fi
 
 2>&1 echo "Building \"$IMAGE_NAME:$IMAGE_TAG\"..."
 
-sudo docker pull docker.io/library/ubuntu:22.04
-FINAL_BASE_IMAGE_DIGEST="$(sudo docker inspect --format='{{index .RepoDigests 0}}' docker.io/library/ubuntu:22.04 | grep -o '[[:alnum:]:]\+$')"
+sudo -u "$BUILD_USER" docker pull docker.io/library/ubuntu:22.04
+FINAL_BASE_IMAGE_DIGEST="$(sudo -u "$BUILD_USER" docker inspect --format='{{index .RepoDigests 0}}' docker.io/library/ubuntu:22.04 | grep -o '[[:alnum:]:]\+$')"
 
-BUILD_BASE_IMAGE='ghcr.io/paulsengroup/ci-docker-images/ubuntu-22.04-cxx-clang-18:latest'
+BUILD_BASE_IMAGE='ghcr.io/paulsengroup/ci-docker-images/ubuntu-22.04-cxx-clang-19:latest'
 
-sudo docker pull "$BUILD_BASE_IMAGE"
+sudo -u "$BUILD_USER" docker pull "$BUILD_BASE_IMAGE"
 
-# sudo docker buildx build --platform linux/amd64,linux/arm64 \
-sudo docker buildx build --platform linux/amd64 \
+# sudo -u "$BUILD_USER" docker buildx build --platform linux/amd64,linux/arm64 \
+sudo -u "$BUILD_USER" docker buildx build --platform linux/amd64 \
   --build-arg "BUILD_BASE_IMAGE=$BUILD_BASE_IMAGE" \
   --build-arg "FINAL_BASE_IMAGE=docker.io/library/ubuntu" \
   --build-arg "FINAL_BASE_IMAGE_TAG=22.04" \
   --build-arg "FINAL_BASE_IMAGE_DIGEST=$FINAL_BASE_IMAGE_DIGEST" \
-  --build-arg "C_COMPILER=clang-18" \
-  --build-arg "CXX_COMPILER=clang++-18" \
+  --build-arg "C_COMPILER=clang-19" \
+  --build-arg "CXX_COMPILER=clang++-19" \
   --build-arg "GIT_HASH=$GIT_HASH" \
   --build-arg "GIT_SHORT_HASH=$GIT_SHORT_HASH" \
   --build-arg "GIT_TAG=$GIT_TAG" \
@@ -73,5 +79,5 @@ sudo docker buildx build --platform linux/amd64 \
   -t "$IMAGE_NAME:$IMAGE_TAG" \
   "$(git rev-parse --show-toplevel)"
 
- # sudo singularity build -F "${img_name}_v${ver}.sif" \
+ # sudo -u "$BUILD_USER" singularity build -F "${img_name}_v${ver}.sif" \
  #                           "docker-daemon://${img_name}:${ver}"