diff --git a/etc/spack/defaults/linux/packages.yaml b/etc/spack/defaults/linux/packages.yaml
new file mode 100644
index 0000000000..6f2d06cc05
--- /dev/null
+++ b/etc/spack/defaults/linux/packages.yaml
@@ -0,0 +1,3 @@
+packages:
+  iconv:
+    require: [libiconv]