diff --git a/util/alpine.sh b/util/alpine.sh
index 168c1f5..54b60e2 100755
--- a/util/alpine.sh
+++ b/util/alpine.sh
@@ -66,28 +66,28 @@ case "$1" in
         alp 3.16 "main community"
         ;;
     old)
-        $0 3.0
-        $0 3.1
-        $0 3.2
-        $0 3.3
-        $0 3.4
-        $0 3.5
-        $0 3.6
-        $0 3.7
-        $0 3.8
-        $0 3.9
-        $0 3.10
-        $0 3.11
-        $0 3.12
+        "$0" 3.0
+        "$0" 3.1
+        "$0" 3.2
+        "$0" 3.3
+        "$0" 3.4
+        "$0" 3.5
+        "$0" 3.6
+        "$0" 3.7
+        "$0" 3.8
+        "$0" 3.9
+        "$0" 3.10
+        "$0" 3.11
+        "$0" 3.12
         ;;
     current)
-        $0 3.13 # till 2022-11-01
-        $0 3.14 # till 2023-05-01
-        $0 3.15 # till 2023-11-01
-        $0 3.16 # till 2024-05-23
+        "$0" 3.13 # till 2022-11-01
+        "$0" 3.14 # till 2023-05-01
+        "$0" 3.15 # till 2023-11-01
+        "$0" 3.16 # till 2024-05-23
         ;;
     all)
-        $0 old
-        $0 current
+        "$0" old
+        "$0" current
         ;;
 esac