diff --git a/var/spack/repos/builtin/packages/axom/package.py b/var/spack/repos/builtin/packages/axom/package.py
index 84eeac28b93..46b411b4e7a 100644
--- a/var/spack/repos/builtin/packages/axom/package.py
+++ b/var/spack/repos/builtin/packages/axom/package.py
@@ -512,4 +512,4 @@ def cmake_args(self):
 
     @run_after('install')
     def install_cmake_cache(self):
-        install(self._get_host_config_path(spec), prefix)
+        install(self._get_host_config_path(self.spec), prefix)