diff --git a/util/alpine.sh b/util/alpine.sh
index 0c88497..168c1f5 100755
--- a/util/alpine.sh
+++ b/util/alpine.sh
@@ -9,7 +9,7 @@ alp() {
     alp_repositories="$2"
 
     for repository in $alp_repositories; do
-        index alpine --sys alpine-"$alp_version" --mirror ${MIRROR}v"$alp_version" --repo "$repository"
+        index alpine --sys "alpine-$alp_version" --mirror "${MIRROR}v$alp_version" --repo "$repository"
     done
 }