diff --git a/scripts/spack b/scripts/spack
index 36a5597db..b482af4b5 100644
--- a/scripts/spack
+++ b/scripts/spack
@@ -163,7 +163,7 @@ spack_install_dependencies ()
 	then
 		if test -n "${CI}"
 		then
-			spack_cmd config add 'packages:all:target:[x86_64]'
+			spack_cmd config --scope site add 'packages:all:target:[x86_64]'
 		fi
 
 		spack_cmd mark --implicit --all