diff --git a/.gitlab/lassen-build-and-test-extra.yml b/.gitlab/lassen-build-and-test-extra.yml
index fcd4509a6..dafb565fc 100644
--- a/.gitlab/lassen-build-and-test-extra.yml
+++ b/.gitlab/lassen-build-and-test-extra.yml
@@ -16,7 +16,7 @@
 # TODO: This is likely an issue in RADIUSS Shared CI: why disable tests ?.
 xl_16_1_1_12_gcc_8_3_1_cuda_11_0_2:
   variables:
-    SPEC: "~shared +fortran ~device_alloc +tools +cuda tests=none %xl@16.1.1.12 cxxflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" cflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" ^cuda@11.0.2 ${PROJECT_LASSEN_DEPS}"
+    SPEC: "~shared +fortran ~device_alloc +tools +cuda tests=none %xl@16.1.1.12 cxxflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" cflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" ^cuda@11.0.2 ${PROJECT_LASSEN_DEPS}"
   extends: .build_and_test_on_lassen
 
 
@@ -39,24 +39,24 @@ ibm_clang_10_0_1_mpi:
 
 ibm_clang_10_0_1_cuda_10_1_168_mpi_shmem:
   variables:
-    SPEC: "~shared ~device_alloc +tools tests=basic %clang@ibm.10.0.1 +cuda +ipc_shmem +mpi cxxflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" cflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" ^spectrum-mpi ^cuda@10.1.168"
+    SPEC: "~shared ~device_alloc +tools tests=basic %clang@ibm.10.0.1 +cuda +ipc_shmem +mpi cxxflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" cflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" ^spectrum-mpi ^cuda@10.1.168"
   extends: .build_and_test_on_lassen
 
 # Extras.
 clang_9_0_0_libcpp:
   variables:
-    SPEC: "~shared ~device_alloc +tools tests=basic %clang@9.0.0+libcpp cxxflags=\"-stdlib=libc++ -DGTEST_HAS_CXXABI_H_=0\" cflags=\"-DGTEST_HAS_CXXABI_H_=0\""
+    SPEC: "~shared ~device_alloc +tools tests=basic %clang@9.0.0+libcpp cxxflags==\"-stdlib=libc++ -DGTEST_HAS_CXXABI_H_=0\" cflags==\"-DGTEST_HAS_CXXABI_H_=0\""
   extends: .build_and_test_on_lassen
 
 clang_9_0_0_memleak:
   variables:
-    SPEC: "~shared +asan +sanitizer_tests +tools ~device_alloc tests=basic %clang@9.0.0 cxxflags=-fsanitize=address"
+    SPEC: "~shared +asan +sanitizer_tests +tools ~device_alloc tests=basic %clang@9.0.0 cxxflags==-fsanitize=address"
     ASAN_OPTIONS: "detect_leaks=1"
   extends: .build_and_test_on_lassen
 
 # clang_9_0_0_datarace (build and test on lassen):
 #   variables:
-#     SPEC: "%clang@9.0.0 cxxflags=-fsanitize=thread"
+#     SPEC: "%clang@9.0.0 cxxflags==\"-fsanitize=thread\""
 #   allow_failure: true
 #   extends: .build_and_test_on_lassen
 
@@ -89,10 +89,10 @@ gcc_8_3_1_tpls:
 
 ibm_clang_9_0_0_gcc_8_3_1_cuda_10_1_168_tpls:
   variables:
-    SPEC: "~shared +fortran +cuda ~device_alloc +tools tests=basic %clang@ibm.9.0.0 cxxflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" cflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" ^cuda@10.1.168 ^blt@develop"
+    SPEC: "~shared +fortran +cuda ~device_alloc +tools tests=basic %clang@ibm.9.0.0 cxxflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" cflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-8.3.1\" ^cuda@10.1.168 ^blt@develop"
   extends: .build_and_test_on_lassen
 
 xl_16_1_1_12_gcc_8_3_1_cuda_10_1_168_tpls:
   variables:
-    SPEC: "~shared +fortran +cuda ~device_alloc +tools tests=basic %xl@16.1.1.12 cxxflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-7.3.1\" cflags=\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-7.3.1\" ^cuda@10.1.168 ^cmake@3.14.5 ^blt@develop"
+    SPEC: "~shared +fortran +cuda ~device_alloc +tools tests=basic %xl@16.1.1.12 cxxflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-7.3.1\" cflags==\"--gcc-toolchain=/usr/tce/packages/gcc/gcc-7.3.1\" ^cuda@10.1.168 ^cmake@3.14.5 ^blt@develop"
   extends: .build_and_test_on_lassen
diff --git a/.gitlab/ruby-build-and-test-extra.yml b/.gitlab/ruby-build-and-test-extra.yml
index 634f18472..fc509c342 100644
--- a/.gitlab/ruby-build-and-test-extra.yml
+++ b/.gitlab/ruby-build-and-test-extra.yml
@@ -34,7 +34,7 @@ clang_10_0_1_sqlite_experimental:
 # Develop builds against specific tpl version.
 pgi_20_1_gcc_local_8_3_1_tpls:
   variables:
-    SPEC: "~shared +fortran ~device_alloc +tools tests=basic %pgi@20.1 cxxflags=-rc=/usr/workspace/umpire/pgi/x86_64/local-gcc-8.3.1-rc cflags=-rc=/usr/workspace/umpire/pgi/x86_64/local-gcc-8.3.1-rc fflags=-rc=/usr/workspace/umpire/pgi/x86_64/local-gcc-8.3.1-rc ^blt@develop"
+    SPEC: "~shared +fortran ~device_alloc +tools tests=basic %pgi@20.1 cxxflags==\"-rc=/usr/workspace/umpire/pgi/x86_64/local-gcc-8.3.1-rc\" cflags==\"-rc=/usr/workspace/umpire/pgi/x86_64/local-gcc-8.3.1-rc\" fflags==\"-rc=/usr/workspace/umpire/pgi/x86_64/local-gcc-8.3.1-rc\" ^blt@develop"
   extends: .build_and_test_on_ruby
 
 clang_10_0_1_tpls:
diff --git a/.uberenv_config.json b/.uberenv_config.json
index 5b2a02d76..6928cfcfa 100644
--- a/.uberenv_config.json
+++ b/.uberenv_config.json
@@ -4,7 +4,7 @@
 "package_final_phase" : "initconfig",
 "package_source_dir" : "../..",
 "spack_url": "https://github.com/spack/spack.git",
-"spack_branch": "v0.18.1",
+"spack_branch": "v0.19.0",
 "spack_activate" : {},
 "spack_configs_path": "scripts/radiuss-spack-configs",
 "spack_packages_path": "scripts/spack_packages",
diff --git a/scripts/radiuss-spack-configs b/scripts/radiuss-spack-configs
index 8d955b4a4..bf8f0bc92 160000
--- a/scripts/radiuss-spack-configs
+++ b/scripts/radiuss-spack-configs
@@ -1 +1 @@
-Subproject commit 8d955b4a49406a12dc44f1a9baab7ab7fa9c68df
+Subproject commit bf8f0bc9217a81b580f3ce1e9d85243f0762adc8