---
layout: post
title: cpanm error "No such file or directory opening compressed index"
category: Perl
tags:
  - cpan
---

If you ever get this error while installing a module `cpanm`:

```
! Finding install on cpanmetadb failed.
! cannot open file '/root/.cpanm/sources/http%www.cpan.org/02packages.details.txt.gz': No such file or directory opening compressed index
! Couldn't find module or a distribution install
```

The problem is caused by not having the `LWP::Protocol::https` module installed,
and the solution is to run `cpanm` with the `--no-lwp` option or installing
`LWP::Protocol::https`.