diff --git a/mirror.sh b/mirror.sh
index 00d0d6d3..de1bbf9b 100755
--- a/mirror.sh
+++ b/mirror.sh
@@ -186,7 +186,8 @@ do_file() {
     esac            
 }
 
-for src in steps/*/sources; do
+for src in steps/*/sources steps-guix/*/sources; do
+    [ -f "${src}" ] || continue
     while read -r line; do
         # shellcheck disable=SC2086
         do_file ${line}