diff --git a/config/versions.json b/config/versions.json
index ef5f303..0ac7ad9 100644
--- a/config/versions.json
+++ b/config/versions.json
@@ -1,5 +1,5 @@
 {
   "$schema": "https://raw.githubusercontent.com/ACCESS-NRI/schema/main/au.org.access-nri/model/deployment/config/versions/4-0-0.json",
   "spack": "1.1",
-  "access-spack-packages": "2026.02.002"
+  "access-spack-packages": "2026.03.001"
 }
diff --git a/spack.yaml b/spack.yaml
index 275a92e..1fc4ca2 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -44,7 +44,7 @@ spack:
       - 'cxxflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'
     access-generic-tracers:
       require:
-      - '@2025.08.000'
+      - '@2026.02.000'
       - 'fflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'
       - 'cflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'
       - 'cxxflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'
@@ -95,7 +95,7 @@ spack:
 
     all:
       prefer:
-      - 'target=x86_64'
+      - 'target=x86_64_v4'
   view: true
   concretizer:
     unify: true