dropshell release 2025.0601.1821

source/install_build_prerequisites.sh

@@ -64,7 +64,9 @@ esac
 # Function to check if a package is installed
 is_package_installed() {
     if [ "$OS" = "Alpine Linux" ]; then
-        apk info | grep -q "^$1$"
+        # Use apk info <pkg> and check exit status
+        apk info "$1" >/dev/null 2>&1
+        return $?
     else
         dpkg -l "$1" 2>/dev/null | grep -q "^ii"
     fi