diff --git a/scripts/add_package.ts b/scripts/add_package.ts
index a136300..671f78f 100644
--- a/scripts/add_package.ts
+++ b/scripts/add_package.ts
@@ -15,7 +15,7 @@ const { name, tag } = match.groups
 const repoUrl = new URL(`${name.slice(1)}.git`, baseRepo)
 
 // Setup destination and remove old versions
-const fsName = name.replace('/', '.')
+const fsName = name.replace('/', '__')
 const packageBase = join(Deno.cwd(), 'packages')
 const destinationBase = join(packageBase, fsName)
 const destinationCurrent = `${destinationBase}@${tag}`