diff --git a/configs/sites/tier2/aws-rocky8/README.md b/configs/sites/tier2/aws-rocky8/README.md
index 901c46620..9705277ea 100644
--- a/configs/sites/tier2/aws-rocky8/README.md
+++ b/configs/sites/tier2/aws-rocky8/README.md
@@ -230,6 +230,7 @@ spack external find --scope system \
     --exclude openssh --exclude python
 spack external find --scope system wget
 spack external find --scope system mysql
+spack external find --scope system grep
 spack compiler find --scope system
 unset SPACK_SYSTEM_CONFIG_PATH
 
@@ -331,6 +332,7 @@ spack external find --scope system perl
 spack external find --scope system wget
 spack external find --scope system texlive
 spack external find --scope system mysql
+spack external find --scope system grep
 
 # No external find for pre-installed intel-oneapi-mpi (from pcluster AMI),
 # and no way to add object entry to list using "spack config add".
diff --git a/configs/sites/tier2/aws-ubuntu2404/README.md b/configs/sites/tier2/aws-ubuntu2404/README.md
index 380209bfc..8a0410032 100644
--- a/configs/sites/tier2/aws-ubuntu2404/README.md
+++ b/configs/sites/tier2/aws-ubuntu2404/README.md
@@ -154,6 +154,7 @@ spack external find --scope system \
     --exclude openssh --exclude python
 spack external find --scope system wget
 spack external find --scope system mysql
+spack external find --scope system grep
 spack compiler find --scope system
 unset SPACK_SYSTEM_CONFIG_PATH
 # ACTION: Edit the site/compilers.yaml with the following.
@@ -253,6 +254,7 @@ spack external find --scope system perl
 spack external find --scope system wget
 spack external find --scope system texlive
 spack external find --scope system mysql
+spack external find --scope system grep
 
 # No external find for pre-installed intel-oneapi-mpi,
 # and no way to add object entry to list using "spack config add".
diff --git a/spack b/spack
index 033e70052..fb5aa538d 160000
--- a/spack
+++ b/spack
@@ -1 +1 @@
-Subproject commit 033e70052dc72dc4858bfee2622780b83952cdc5
+Subproject commit fb5aa538da9fdcb8fce0aee2dd4d7c17f9dd601a