diff --git a/.uberenv_config.json b/.uberenv_config.json
index 5f201a4b..9ebb8c7b 100644
--- a/.uberenv_config.json
+++ b/.uberenv_config.json
@@ -8,6 +8,6 @@
 "spack_url": "https://github.com/spack/spack",
 "spack_commit": "0c2be44e4ece21eb091ad5de4c97716b7c6d4c87",
 "spack_commit_note": "v1.1.0 (Nov 14th 2025)",
-"spack_packages_commit": "cfa8d650480c409de2d568cf1355bf7e509f4c1c",
-"spack_packages_note": "Jan 21st 2026"
+"spack_packages_commit": "3dd98680871078353a28ee508fa76c7554f918fa",
+"spack_packages_note": "Feb 25th 2026"
 }
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 588800b3..cd80f5db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -334,7 +334,7 @@ list(APPEND build_list silo )
 
 
 set(RAJA_DIR "${CMAKE_INSTALL_PREFIX}/raja")
-set(RAJA_URL "${TPL_MIRROR_DIR}/RAJA-v2025.03.0.tar.gz")
+set(RAJA_URL "${TPL_MIRROR_DIR}/RAJA-v2025.12.0.tar.gz")
 
 
 message(STATUS "Building RAJA found at ${RAJA_URL}")
@@ -374,7 +374,7 @@ list(APPEND build_list raja )
 # CHAI
 ################################
 set(CHAI_DIR "${CMAKE_INSTALL_PREFIX}/chai")
-set(CHAI_URL "${TPL_MIRROR_DIR}/chai-2025.03.0.tar.gz")
+set(CHAI_URL "${TPL_MIRROR_DIR}/chai-2025.12.0.tar.gz")
 message(STATUS "Building CHAI found at ${CHAI_URL}")
 
 ExternalProject_Add( chai
@@ -448,7 +448,7 @@ if (ENABLE_CALIPER)
 
 
     set(CALIPER_DIR "${CMAKE_INSTALL_PREFIX}/caliper")
-    set(CALIPER_URL "${TPL_MIRROR_DIR}/Caliper-2.12.0.tar.gz")
+    set(CALIPER_URL "${TPL_MIRROR_DIR}/Caliper-2.14.0.tar.gz")
     message(STATUS "Building Caliper found at ${CALIPER_URL}")
 
     set(CALIPER_WITH_CUPTI OFF)
diff --git a/cmake/blt b/cmake/blt
index 9ff77344..e783e30f 160000
--- a/cmake/blt
+++ b/cmake/blt
@@ -1 +1 @@
-Subproject commit 9ff77344f0b2a6ee345e452bddd6bfd46cbbfa35
+Subproject commit e783e30f2823ee1a208f7f90741b41c1f5a08063
diff --git a/scripts/spack_configs/versions.yaml b/scripts/spack_configs/versions.yaml
index 5708dbb8..7c5da2af 100644
--- a/scripts/spack_configs/versions.yaml
+++ b/scripts/spack_configs/versions.yaml
@@ -14,34 +14,10 @@
 # This file lists the package versions for geos's dependencies
 #
 packages:
-  # v0.6.2
-  blt:
-    require: "@git.9ff77344f0b2a6ee345e452bddd6bfd46cbbfa35=develop"
-
   # master - 01/23/26
   hypre:
     require: "@git.8b0093306228fef1b92384d9face7fbe5a63b460=master"
 
-  # v2025.0.3.0
-  chai:
-    require: "@git.4b9060b18b9bec1167026cfb3132bd540c4bd56b=develop"
-
-  # v2025.0.3.0
-  umpire:
-    require: "@git.1ed0669c57f041baa1f1070693991c3a7a43e7ee=develop"
-
-  # v2025.0.3.0
-  raja:
-    require: "@git.1d70abf171474d331f1409908bdf1b1c3fe19222=develop"
-
-  # v2025.0.3.0
-  camp:
-    require: "@git.ee0a3069a7ae72da8bcea63c06260fad34901d43=main"
-
-  # v2.12.0
-  caliper:
-    require: "@git.287b7f3ad2d12f520aad04268d44f353cd05403c"
-
   # v0.9.2
   conduit:
     require: "@git.ad86e316ad56a75c099d30ca5ce75cff275b5924=develop"
diff --git a/scripts/spack_packages/packages/geosx/package.py b/scripts/spack_packages/packages/geosx/package.py
index 3bcac0cb..1c1d119d 100644
--- a/scripts/spack_packages/packages/geosx/package.py
+++ b/scripts/spack_packages/packages/geosx/package.py
@@ -76,6 +76,7 @@ class Geosx(CMakePackage, CudaPackage, ROCmPackage):
             multi=False)
     variant('grpc', default=False, description='Enable gRPC.')
     variant('pygeosx', default=True, description='Enable pygeosx.')
+    variant('cxxstd', default='17', description='CXX standard.')
 
     # SPHINX_END_VARIANTS
 
@@ -98,7 +99,7 @@ class Geosx(CMakePackage, CudaPackage, ROCmPackage):
 
     depends_on('cmake@3.24:', type='build')
 
-    depends_on('blt')
+    depends_on('blt@0.7.1')
 
     #
     # Virtual packages
@@ -110,20 +111,14 @@ class Geosx(CMakePackage, CudaPackage, ROCmPackage):
     #
     # Performance portability
     #
-    depends_on('raja ~examples~exercises~shared')
-    depends_on("raja~openmp", when="~openmp")
-    depends_on("raja+openmp", when="+openmp")
-
-    depends_on('umpire +c~examples+fortran~device_alloc~shared')
-    depends_on("umpire~openmp", when="~openmp")
-    depends_on("umpire+openmp", when="+openmp")
-
-    depends_on('chai +raja~examples~shared')
-    depends_on("chai~openmp", when="~openmp")
-    depends_on("chai+openmp", when="+openmp")
-
-    depends_on('camp')
-
+    raja_suite_version="2025.12.0"
+    depends_on(f"raja @{raja_suite_version} ~examples~exercises~shared")
+    depends_on(f"chai @{raja_suite_version} +raja~examples~shared")
+    depends_on(f"camp @{raja_suite_version}")
+    depends_on(f"umpire @{raja_suite_version} +c~examples+fortran~device_alloc~shared")
+    with when('+openmp'):
+        for pkg in ('raja', 'chai', 'umpire'):
+            depends_on(f"{pkg}+openmp", when="+openmp")
     #
     # GPUs
     #
@@ -152,11 +147,13 @@ class Geosx(CMakePackage, CudaPackage, ROCmPackage):
     depends_on('conduit~test~fortran~hdf5_compat+shared')
 
     depends_on('adiak@0.4.0 ~shared', when='+caliper')
-    depends_on('caliper~gotcha~sampler~libunwind~libdw', when='+caliper')
+    depends_on('caliper@2.14.0 ~gotcha~sampler~libunwind~libdw', when='+caliper')
 
     depends_on('pugixml@1.13 ~shared')
 
-    depends_on('fmt@10.0.0 cxxstd=14')
+    depends_on('fmt@11')
+    for _fmt_cxxstd in ('14', '17', '20'):
+        depends_on(f'fmt@11 cxxstd={_fmt_cxxstd}', when=f'cxxstd={_fmt_cxxstd}')
     depends_on('vtk@9.4.2', when='+vtk')
 
     #
@@ -355,7 +352,7 @@ def geos_hostconfig(self, spec, prefix, py_site_pkgs_dir=None):
             cfg.write("# CMake Standard\n")
             cfg.write("#{0}\n\n".format("-" * 80))
 
-            cfg.write(cmake_cache_string("BLT_CXX_STD", "c++17"))
+            cfg.write(cmake_cache_string("BLT_CXX_STD", f"c++{spec.variants['cxxstd'].value}"))
 
             cfg.write("#{0}\n".format("-" * 80))
             cfg.write("# MPI\n")
@@ -439,7 +436,7 @@ def geos_hostconfig(self, spec, prefix, py_site_pkgs_dir=None):
             cfg.write('#{0}\n\n'.format('-' * 80))
             if '+cuda' in spec:
                 cfg.write(cmake_cache_option('ENABLE_CUDA', True))
-                cfg.write(cmake_cache_entry('CMAKE_CUDA_STANDARD', 17))
+                cfg.write(cmake_cache_string('CMAKE_CUDA_STANDARD', spec.variants['cxxstd'].value))
 
                 cudatoolkitdir = spec['cuda'].prefix
                 cfg.write(cmake_cache_entry('CUDA_TOOLKIT_ROOT_DIR', cudatoolkitdir))
@@ -484,7 +481,7 @@ def geos_hostconfig(self, spec, prefix, py_site_pkgs_dir=None):
             cfg.write('#{0}\n\n'.format('-' * 80))
             if '+rocm' in spec:
                 cfg.write(cmake_cache_option('ENABLE_HIP', True))
-                cfg.write(cmake_cache_string('CMAKE_HIP_STANDARD', 17))
+                cfg.write(cmake_cache_string('CMAKE_HIP_STANDARD', spec.variants['cxxstd'].value))
                 cfg.write(cmake_cache_entry('CMAKE_HIP_COMPILER', spec['hip'].prefix.bin.hipcc))
 
                 if not spec.satisfies('amdgpu_target=none'):
@@ -532,7 +529,20 @@ def geos_hostconfig(self, spec, prefix, py_site_pkgs_dir=None):
 
             for tpl, cmake_name, enable in io_tpls:
                 if enable:
-                    cfg.write(cmake_cache_entry('{}_DIR'.format(cmake_name), spec[tpl].prefix))
+                    dep_spec = None
+                    if tpl == 'zlib':
+                        # Spack may concretize zlib-api to zlib-ng instead of zlib.
+                        for candidate in ('zlib', 'zlib-ng', 'zlib-api'):
+                            try:
+                                dep_spec = spec[candidate]
+                                break
+                            except KeyError:
+                                pass
+                        if dep_spec is None:
+                            raise KeyError("No zlib provider (zlib/zlib-ng/zlib-api) found in {0}".format(spec))
+                    else:
+                        dep_spec = spec[tpl]
+                    cfg.write(cmake_cache_entry('{}_DIR'.format(cmake_name), dep_spec.prefix))
                 else:
                     cfg.write(cmake_cache_option('ENABLE_{}'.format(cmake_name), False))
 
@@ -754,7 +764,7 @@ def lvarray_hostconfig(self, spec, prefix, py_site_pkgs_dir=None):
             cfg.write('#{0}\n\n'.format('-' * 80))
             if '+cuda' in spec:
                 cfg.write(cmake_cache_option('ENABLE_CUDA', True))
-                cfg.write(cmake_cache_entry('CMAKE_CUDA_STANDARD', 17))
+                cfg.write(cmake_cache_string('CMAKE_CUDA_STANDARD', spec.variants['cxxstd'].value))
 
                 cudatoolkitdir = spec['cuda'].prefix
                 cfg.write(cmake_cache_entry('CUDA_TOOLKIT_ROOT_DIR', cudatoolkitdir))
diff --git a/tplMirror/Caliper-2.12.0.tar.gz b/tplMirror/Caliper-2.12.0.tar.gz
deleted file mode 100644
index 12c4753f..00000000
--- a/tplMirror/Caliper-2.12.0.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3e76d64905e4c17676d78047a8e84edbcbe4176edf789850fce42f69a7d9d1e2
-size 2089422
diff --git a/tplMirror/Caliper-2.14.0.tar.gz b/tplMirror/Caliper-2.14.0.tar.gz
new file mode 100644
index 00000000..ddfa6526
--- /dev/null
+++ b/tplMirror/Caliper-2.14.0.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b42c35dfbe485960dd326033893dae37ac00d9807c5c3e6b5b1f396bc4af273f
+size 2093696
diff --git a/tplMirror/RAJA-v2025.03.0.tar.gz b/tplMirror/RAJA-v2025.03.0.tar.gz
deleted file mode 100644
index 49233dc7..00000000
--- a/tplMirror/RAJA-v2025.03.0.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:60d047e04e7e7855f7b31e5f54bf66e465c52a6efb3871ace33cc8da1cb1b9ae
-size 11182913
diff --git a/tplMirror/RAJA-v2025.12.0.tar.gz b/tplMirror/RAJA-v2025.12.0.tar.gz
new file mode 100644
index 00000000..4a17ad92
--- /dev/null
+++ b/tplMirror/RAJA-v2025.12.0.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0e8b4656a79fe01f01b122947365537537505073e4a8dbf388ee85f105f678d2
+size 10997567
diff --git a/tplMirror/chai-2025.03.0.tar.gz b/tplMirror/chai-2025.03.0.tar.gz
deleted file mode 100644
index 088ebdda..00000000
--- a/tplMirror/chai-2025.03.0.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:144917f3185b7d112392e9f99c1fbc74b9e0be79cdbee445e0879ea2487d3d73
-size 23937809
diff --git a/tplMirror/chai-v2025.12.0.tar.gz b/tplMirror/chai-v2025.12.0.tar.gz
new file mode 100644
index 00000000..897ff763
--- /dev/null
+++ b/tplMirror/chai-v2025.12.0.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c77a17dbb1aade696681b7b747a7437f4e4252361d57dca1fe7edd20d5b1984b
+size 23851995