diff --git a/.chezmoi.toml.tmpl b/.chezmoi.toml.tmpl
index 2faf42d..6273ff4 100644
--- a/.chezmoi.toml.tmpl
+++ b/.chezmoi.toml.tmpl
@@ -9,4 +9,5 @@
 [data]
     use_zsh_root_dir = {{ $use_zsh_root_dir }}
     email = {{ $email | quote }}
-    test_machine = {{ $test_machine }}
\ No newline at end of file
+    test_machine = {{ $test_machine }}
+    spack_packages = false
\ No newline at end of file
diff --git a/run_once_after_install-spack-packages-cluster.sh.tmpl b/run_once_after_install-spack-packages-cluster.sh.tmpl
index ce8ee14..fd77c26 100644
--- a/run_once_after_install-spack-packages-cluster.sh.tmpl
+++ b/run_once_after_install-spack-packages-cluster.sh.tmpl
@@ -1,4 +1,4 @@
-{{- if (and (eq .chezmoi.os "linux") (not .test_machine)) -}}
+{{- if (and (eq .chezmoi.os "linux") (.spack_packages)) -}}
 
 #!/usr/bin/env bash