diff --git a/configs/common/modules_lmod.yaml b/configs/common/modules_lmod.yaml
index 7d9957bfc..ca6377e24 100644
--- a/configs/common/modules_lmod.yaml
+++ b/configs/common/modules_lmod.yaml
@@ -137,6 +137,8 @@ modules:
           ^esmf@8.5.0+debug snapshot=none: 'esmf-8.5.0-debug'
           ^esmf@8.6.0~debug snapshot=none: 'esmf-8.6.0'
           ^esmf@8.6.0+debug snapshot=none: 'esmf-8.6.0-debug'
+          ^esmf@8.6.1~debug snapshot=none: 'esmf-8.6.1'
+          ^esmf@8.6.1+debug snapshot=none: 'esmf-8.6.1-debug'
       openmpi:
         environment:
           set:
diff --git a/configs/common/modules_tcl.yaml b/configs/common/modules_tcl.yaml
index afe12a2be..b0ec46b45 100644
--- a/configs/common/modules_tcl.yaml
+++ b/configs/common/modules_tcl.yaml
@@ -139,6 +139,8 @@ modules:
           ^esmf@8.5.0+debug snapshot=none: 'esmf-8.5.0-debug'
           ^esmf@8.6.0~debug snapshot=none: 'esmf-8.6.0'
           ^esmf@8.6.0+debug snapshot=none: 'esmf-8.6.0-debug'
+          ^esmf@8.6.1~debug snapshot=none: 'esmf-8.6.1'
+          ^esmf@8.6.1+debug snapshot=none: 'esmf-8.6.1-debug'
       openmpi:
         environment:
           set:
diff --git a/configs/common/packages.yaml b/configs/common/packages.yaml
index 0034143e2..55c462fb2 100644
--- a/configs/common/packages.yaml
+++ b/configs/common/packages.yaml
@@ -60,6 +60,8 @@
     # config and update the projections for lmod/tcl.
     # Also, check the acorn and derecho site configs which have esmf modifications.
     esmf:
+      #version: ['8.6.1']
+      #variants: ~xerces ~pnetcdf snapshot=none ~shared +external-parallelio
       version: ['8.5.0']
       variants: ~xerces ~pnetcdf snapshot=none ~shared +external-parallelio
       require:
@@ -143,6 +145,8 @@
       # also: ... extdata2g segfault UFS?
       version: ['2.40.3']
       variants: ~shared ~extdata2g ~pflogger
+      #version: ['2.46.2']
+      #variants: +pflogger
     # If making changes here, also check the Discover site config and the CI workflows
     met:
       version: ['11.1.0']
diff --git a/spack b/spack
index 595a31bd0..c00df5436 160000
--- a/spack
+++ b/spack
@@ -1 +1 @@
-Subproject commit 595a31bd0bb05a7e2017facc41552722919a8aaa
+Subproject commit c00df543689f2fc11ae2d2a70b196e664dcba6c4