diff --git a/.gitlab/custom-jobs-and-variables.yml b/.gitlab/custom-jobs-and-variables.yml
index 931d1961b..063cabb90 100644
--- a/.gitlab/custom-jobs-and-variables.yml
+++ b/.gitlab/custom-jobs-and-variables.yml
@@ -71,3 +71,15 @@ variables:
   artifacts:
     reports:
       junit: junit.xml
+
+.reproducer_vars:
+  script:
+    - |
+      echo -e "
+      # Required variables \n
+      export MODULE_LIST=\"${MODULE_LIST}\" \n
+      export SPEC=\"${SPEC//\"/\\\"}\" \n
+      # Allow to set job script for debugging (only this differs from CI) \n
+      export DEBUG_MODE=true \n
+      # Using the CI build cache is optional and requires a token. Set it like so: \n
+      # export REGISTRY_TOKEN=\"<your token here>\" \n"
diff --git a/.gitlab/jobs/corona.yml b/.gitlab/jobs/corona.yml
index 8fec233c5..9af5ba72b 100644
--- a/.gitlab/jobs/corona.yml
+++ b/.gitlab/jobs/corona.yml
@@ -9,9 +9,7 @@
 # Override reproducer section to define project specific variables.
 .corona_reproducer_vars:
   script:
-    - |
-      echo -e "export MODULE_LIST=\"${MODULE_LIST}\""
-      echo -e "export SPEC=\"${SPEC//\"/\\\"}\""
+    - !reference [.reproducer_vars, script]
 
 ########################
 # Overridden shared jobs
diff --git a/.gitlab/jobs/lassen.yml b/.gitlab/jobs/lassen.yml
index c6eacf864..1b9bc0eda 100644
--- a/.gitlab/jobs/lassen.yml
+++ b/.gitlab/jobs/lassen.yml
@@ -9,9 +9,7 @@
 # Override reproducer section to define project specific variables.
 .lassen_reproducer_vars:
   script:
-    - |
-      echo -e "export MODULE_LIST=\"${MODULE_LIST}\""
-      echo -e "export SPEC=\"${SPEC//\"/\\\"}\""
+    - !reference [.reproducer_vars, script]
 
 ########################
 # Overridden shared jobs
@@ -44,14 +42,14 @@ gcc_8_3_1:
 gcc_8_3_1_cuda_11_5_0_ats_disabled:
   extends: .job_on_lassen
   variables:
-    SPEC: " ~shared +openmp +cuda %gcc@=8.3.1 cuda_arch=70 ^cuda@11.5.0+allow-unsupported-compilers ${PROJECT_LASSEN_DEPS}"
+    SPEC: " ~shared +openmp +cuda %gcc@=8.3.1 cuda_arch=70 ^cuda@11.5.0+allow-unsupported-compilers ^blt@develop"
     MODULE_LIST: "cuda/11.5.0"
     LASSEN_JOB_ALLOC: "1 --atsdisable -W 30 -q pci"
 
 gcc_8_3_1_cuda_11_5_0_ats_disabled_mpi:
   extends: .job_on_lassen
   variables:
-    SPEC: " ~shared +openmp +cuda +mpi %gcc@=8.3.1 cuda_arch=70 ^cuda@11.5.0+allow-unsupported-compilers ^spectrum-mpi ${PROJECT_LASSEN_DEPS}"
+    SPEC: " ~shared +openmp +cuda +mpi %gcc@=8.3.1 cuda_arch=70 ^cuda@11.5.0+allow-unsupported-compilers ^spectrum-mpi ^blt@develop"
     MODULE_LIST: "cuda/11.5.0"
     LASSEN_JOB_ALLOC: "1 --atsdisable -W 30 -q pci"
 
@@ -61,7 +59,7 @@ gcc_8_3_1_cuda_11_5_0_ats_disabled_mpi:
 
 clang_13_0_1_libcpp:
   variables:
-    SPEC: " ~shared +openmp %clang@=13.0.1 cflags==\"-DGTEST_HAS_CXXABI_H_=0\" cxxflags==\"-stdlib=libc++ -DGTEST_HAS_CXXABI_H_=0\" ${PROJECT_LASSEN_DEPS}"
+    SPEC: " ~shared +openmp %clang@=13.0.1 cflags==\"-DGTEST_HAS_CXXABI_H_=0\" cxxflags==\"-stdlib=libc++ -DGTEST_HAS_CXXABI_H_=0\" ^blt@develop"
   extends: .job_on_lassen
 
 #clang_14_0_5_asan:
diff --git a/.gitlab/jobs/poodle.yml b/.gitlab/jobs/poodle.yml
index ed18f60f5..8e86158f0 100644
--- a/.gitlab/jobs/poodle.yml
+++ b/.gitlab/jobs/poodle.yml
@@ -9,9 +9,7 @@
 # Override reproducer section to define projet specific variables.
 .poodle_reproducer_vars:
   script:
-    - |
-      echo -e "export MODULE_LIST=\"${MODULE_LIST}\""
-      echo -e "export SPEC=\"${SPEC//\"/\\\"}\""
+    - !reference [.reproducer_vars, script]
 
 ########################
 # Overridden shared jobs
@@ -50,6 +48,6 @@ intel_2022_1_0:
 
 intel_2022_1_0_mpi:
   variables:
-    SPEC: "~shared +openmp +mpi %intel@=2022.1.0 ^mvapich2 ${PROJECT_POODLE_DEPS}"
+    SPEC: "~shared +openmp +mpi %intel@=2022.1.0 ^mvapich2 ^blt@develop"
   allow_failure: true
   extends: .job_on_poodle
diff --git a/.gitlab/jobs/ruby.yml b/.gitlab/jobs/ruby.yml
index 3502ed3fb..c19e36d12 100644
--- a/.gitlab/jobs/ruby.yml
+++ b/.gitlab/jobs/ruby.yml
@@ -9,9 +9,7 @@
 # Override reproducer section to define project specific variables.
 .ruby_reproducer_vars:
   script:
-    - |
-      echo -e "export MODULE_LIST=\"${MODULE_LIST}\""
-      echo -e "export SPEC=\"${SPEC//\"/\\\"}\""
+    - !reference [.reproducer_vars, script]
 
 #######################
 # Overridden shared jobs
@@ -51,5 +49,5 @@ intel_2022_1_0:
 
 intel_2022_1_0_mpi:
   variables:
-    SPEC: "~shared +openmp +mpi %intel@=2022.1.0 ^mvapich2 ${PROJECT_RUBY_DEPS}"
+    SPEC: "~shared +openmp +mpi %intel@=2022.1.0 ^mvapich2 ^blt@develop"
   extends: .job_on_ruby
diff --git a/.gitlab/jobs/tioga.yml b/.gitlab/jobs/tioga.yml
index bcf9eccb8..00ed3c276 100644
--- a/.gitlab/jobs/tioga.yml
+++ b/.gitlab/jobs/tioga.yml
@@ -9,9 +9,7 @@
 # Override reproducer section to define project specific variables.
 .tioga_reproducer_vars:
   script:
-    - |
-      echo -e "export MODULE_LIST=\"${MODULE_LIST}\""
-      echo -e "export SPEC=\"${SPEC//\"/\\\"}\""
+    - !reference [.reproducer_vars, script]
 
 ########################
 # Overridden shared jobs
@@ -31,11 +29,11 @@
 
 rocmcc_6_1_1_hip_openmp:
   variables:
-    SPEC: "~shared +rocm +openmp amdgpu_target=gfx90a %rocmcc@=6.1.1 ^hip@6.1.1 ${PROJECT_TIOGA_DEPS}"
+    SPEC: "~shared +rocm +openmp amdgpu_target=gfx90a %rocmcc@=6.1.1 ^hip@6.1.1 ^blt@develop"
   extends: .job_on_tioga
 
 rocmcc_6_1_1_hip_openmp_mpi:
   variables:
-    SPEC: "~shared +rocm +openmp +mpi amdgpu_target=gfx90a %rocmcc@=6.1.1 ^hip@6.1.1 ${PROJECT_TIOGA_DEPS}"
+    SPEC: "~shared +rocm +openmp +mpi amdgpu_target=gfx90a %rocmcc@=6.1.1 ^hip@6.1.1 ^blt@develop"
   extends: .job_on_tioga
   allow_failure: true
diff --git a/scripts/gitlab/build_and_test.sh b/scripts/gitlab/build_and_test.sh
index 430d50b4b..f2d020918 100755
--- a/scripts/gitlab/build_and_test.sh
+++ b/scripts/gitlab/build_and_test.sh
@@ -26,6 +26,8 @@ spec=${SPEC:-""}
 module_list=${MODULE_LIST:-""}
 job_unique_id=${CI_JOB_ID:-""}
 use_dev_shm=${USE_DEV_SHM:-true}
+spack_debug=${SPACK_DEBUG:-false}
+debug_mode=${DEBUG_MODE:-false}
 
 raja_version=${UPDATE_RAJA:-""}
 sys_type=${SYS_TYPE:-""}
@@ -33,6 +35,32 @@ sys_type=${SYS_TYPE:-""}
 spack_upstream_path=${SPACK_UPSTREAM_PATH:-"/usr/workspace/umdev/RAJAPerf/upstream"}
 update_spack_upstream=${UPDATE_SPACK_UPSTREAM:-false}
 
+# REGISTRY_TOKEN allows you to provide your own personal access token to the CI
+# registry. Be sure to set the token with at least read access to the registry.
+registry_token=${REGISTRY_TOKEN:-""}
+ci_registry_user=${CI_REGISTRY_USER:-"${USER}"}
+ci_registry_image=${CI_REGISTRY_IMAGE:-"czregistry.llnl.gov:5050/radiuss/rajaperf"}
+ci_registry_token=${CI_JOB_TOKEN:-"${registry_token}"}
+
+timed_message ()
+{
+    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    echo "~ $(date --rfc-3339=seconds) ~ ${1}"
+    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+}
+
+if [[ ${debug_mode} == true ]]
+then
+    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    echo "~~~~~ Debug mode:"
+    echo "~~~~~ - Spack debug mode."
+    echo "~~~~~ - Deactivated shared memory."
+    echo "~~~~~ - Do not push to buildcache."
+    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    use_dev_shm=false
+    spack_debug=true
+fi
+
 if [[ -n ${module_list} ]]
 then
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
@@ -62,27 +90,33 @@ then
     fi
 
     prefix="${prefix}-${job_unique_id}"
-    mkdir -p ${prefix}
 else
     # We set the prefix in the parent directory so that spack dependencies are not installed inside the source tree.
     prefix="$(pwd)/../spack-and-build-root"
-    mkdir -p ${prefix}
+fi
+
+echo "Creating directory ${prefix}"
+echo "project_dir: ${project_dir}"
+
+mkdir -p ${prefix}
+
+spack_cmd="${prefix}/spack/bin/spack"
+spack_env_path="${prefix}/spack_env"
+uberenv_cmd="$(pwd)/tpl/RAJA/scripts/uberenv/uberenv.py --project-json=$(pwd)/.uberenv_config.json"
+if [[ ${spack_debug} == true ]]
+then
+    spack_cmd="${spack_cmd} --debug --stacktrace"
+    uberenv_cmd="${uberenv_cmd} --spack-debug"
 fi
 
 # Dependencies
-date
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-echo "~~~~~ Build and test started"
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
 if [[ "${option}" != "--build-only" && "${option}" != "--test-only" ]]
 then
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "~~~~~ Building Dependencies"
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    timed_message "Building dependencies"
 
     if [[ -z ${spec} ]]
     then
-        echo "SPEC is undefined, aborting..."
+        echo "[Error]: SPEC is undefined, aborting..."
         exit 1
     fi
 
@@ -102,17 +136,32 @@ then
     export SPACK_USER_CACHE_PATH="${spack_user_cache}"
     mkdir -p ${spack_user_cache}
 
-    ./tpl/RAJA/scripts/uberenv/uberenv.py --project-json=".uberenv_config.json" --spec="${spec}" ${prefix_opt} ${upstream_opt}
+    # generate cmake cache file with uberenv and radiuss spack package
+    timed_message "Spack setup and environment"
+    ${uberenv_cmd} --setup-and-env-only --spec="${spec}" ${prefix_opt} ${upstream_opt}
+
+    if [[ -n ${ci_registry_token} ]]
+    then
+        timed_message "GitLab registry as Spack Buildcache"
+        ${spack_cmd} -D ${spack_env_path} mirror add --unsigned --oci-username ${ci_registry_user} --oci-password ${ci_registry_token} gitlab_ci oci://${ci_registry_image}
+    fi
+
+    timed_message "Spack build of dependencies"
+    ${uberenv_cmd} --skip-setup-and-env --spec="${spec}" ${prefix_opt} ${upstream_opt}
+
+    if [[ -n ${ci_registry_token} && ${debug_mode} == false ]]
+    then
+        timed_message "Push dependencies to buildcache"
+        ${spack_cmd} -D ${spack_env_path} buildcache push --only dependencies gitlab_ci
+    fi
+
+    timed_message "Dependencies built"
 
     mv ${project_dir}/tpl/RAJA/*.cmake ${project_dir}/.
 
 fi
-  echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-  echo "~~~~~ Dependencies Built"
-  echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-date
 
-# Host config file
+# Find cmake cache file (hostconfig)
 if [[ -z ${hostconfig} ]]
 then
     # If no host config file was provided, we assume it was generated.
@@ -121,24 +170,24 @@ then
     if [[ ${#hostconfigs[@]} == 1 ]]
     then
         hostconfig_path=${hostconfigs[0]}
-        echo "Found host config file: ${hostconfig_path}"
     elif [[ ${#hostconfigs[@]} == 0 ]]
     then
-        echo "No result for: ${project_dir}/*.cmake"
-        echo "Spack generated host-config not found."
+        echo "[Error]: No result for: ${project_dir}/*.cmake"
+        echo "[Error]: Spack generated host-config not found."
         exit 1
     else
-        echo "More than one result for: ${project_dir}/*.cmake"
-        echo "${hostconfigs[@]}"
-        echo "Please specify one with HOST_CONFIG variable"
+        echo "[Error]: More than one result for: ${project_dir}/*.cmake"
+        echo "[Error]: ${hostconfigs[@]}"
+        echo "[Error]: Please specify one with HOST_CONFIG variable"
         exit 1
     fi
 else
     # Using provided host-config file.
-    hostconfig_path="${project_dir}/host-configs/${hostconfig}"
+    hostconfig_path="${project_dir}/${hostconfig}"
 fi
 
 hostconfig=$(basename ${hostconfig_path})
+echo "[Information]: Found hostconfig ${hostconfig_path}"
 
 # Build Directory
 # When using /dev/shm, we use prefix for both spack builds and source build, unless BUILD_ROOT was defined
@@ -151,16 +200,13 @@ cmake_exe=`grep 'CMake executable' ${hostconfig_path} | cut -d ':' -f 2 | xargs`
 # Build
 if [[ "${option}" != "--deps-only" && "${option}" != "--test-only" ]]
 then
-    date
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
     echo "~ Host-config: ${hostconfig_path}"
     echo "~ Build Dir:   ${build_dir}"
     echo "~ Project Dir: ${project_dir}"
     echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
     echo ""
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "~~~~~ Building RAJA Perf Suite"
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    timed_message "Cleaning working directory"
 
     # Map CPU core allocations
     declare -A core_counts=(["lassen"]=40 ["ruby"]=28 ["poodle"]=28 ["corona"]=32 ["rzansel"]=48 ["tioga"]=32)
@@ -169,13 +215,9 @@ then
     if [[ -n ${raja_version} ]]
     then
       cd tpl/RAJA
-      echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-      echo "~~~~ Updating RAJA Submodule to develop ~~~"
-      echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+      timed_message "Updating RAJA Submodule to develop"
       git pull origin develop
-      echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-      echo "~~~~ Updating Submodules within RAJA ~~~~~~"
-      echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+      timed_message "Updating Submodules within RAJA"
       git submodule update --init --recursive
       cd -
     fi
@@ -207,66 +249,48 @@ then
       ${project_dir}
     if ! $cmake_exe --build . -j ${core_counts[$truehostname]}
     then
-        echo "ERROR: compilation failed, building with verbose output..."
+        echo "[Error]: Compilation failed, building with verbose output..."
+        timed_message "Re-building with --verbose"
         $cmake_exe --build . --verbose -j 1
     fi
-    date
 
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    echo "~~~~~ RAJA Perf Suite Built"
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+    timed_message "RAJA Perf Suite built"
 fi
 
-if [[ ! -d ${build_dir} ]]
+# Test
+if [[ "${option}" != "--build-only" ]] && grep -q -i "ENABLE_TESTS.*ON" ${hostconfig_path}
 then
-    echo "ERROR: Build directory not found : ${build_dir}" && exit 1
-fi
-
-cd ${build_dir}
-
-date
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-echo "~~~~~ TESTING RAJAPERF SUITE"
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
 
-if grep -q -i "ENABLE_TESTS.*ON" ${hostconfig_path}
-then
+    if [[ ! -d ${build_dir} ]]
+    then
+        echo "[Error]: Build directory not found : ${build_dir}" && exit 1
+    fi
 
-    #
-    # Maintaining separate, but identical release and debug sections
-    # in case we want to make them disctinct in the future.
-    #
+    cd ${build_dir}
 
-    echo "~~~~~~~~~ Run Command: ~~~~~~~~~~~~~~~~~~~~~"
-    echo "ctest --output-on-failure -T test 2>&1 | tee tests_output.txt"
-    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-    date
+    timed_message "Testing RAJA Perf Suite"
     ctest --output-on-failure -T test 2>&1 | tee tests_output.txt
-    date
 
     no_test_str="No tests were found!!!"
     if [[ "$(tail -n 1 tests_output.txt)" == "${no_test_str}" ]]
     then
-        echo "ERROR: No tests were found" && exit 1
+        echo "[Error]: No tests were found" && exit 1
     fi
 
-    echo "Copying Testing xml reports for export"
+    timed_message "Preparing tests xml reports for export"
     tree Testing
     xsltproc -o junit.xml ${project_dir}/blt/tests/ctest-to-junit.xsl Testing/*/Test.xml
     mv junit.xml ${project_dir}/junit.xml
 
     if grep -q "Errors while running CTest" ./tests_output.txt
     then
-        echo "ERROR: failure(s) while running CTest" && exit 1
+        echo "[Error]: Failure(s) while running CTest" && exit 1
     fi
+
+    timed_message "RAJA Perf Suite tests completed"
 fi
 
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-echo "~~~~~ CLEAN UP"
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+timed_message "Cleaning up"
 make clean
 
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-echo "~~~~~ Build and test completed"
-echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
-date
+timed_message "Build and test completed"