diff --git a/preinstall b/preinstall
index 62d3626..dfd3131 100755
--- a/preinstall
+++ b/preinstall
@@ -25,8 +25,8 @@ for package in required_packages.to_be_installed:
     packages = packages + package + " "
 try:
     breakpoint()
-    ret = run("sudo", "pacman", "-S", packages)
+    ret = run("sudo", "pacman", "-S %s" % packages)
     print(ret)
 except Exception as e:
-    ret = run("pacman", "-S", packages)
+    ret = run("pacman", "-S %s" % packages)
     print(ret)