Subject: Emacs info can't open info manuals

From: sirgazil <[email-masked]>
Date: Sun, 05 May 2019 15:10:44 -0500

I can't open info manuals in an Emacs freshly installed in my GNU system installed in a real machine using the ISO installer (https://ftp.gnu.org/gnu/guix/guix-system-install-1.0.0.x86_64-linux.iso.xz).

## Steps to reproduce

1. guix install emacs
2. Start Emacs.
3. M-x info Enter.
4. m Guix Enter (or any other manual).

## Unexpected result

The manual is not displayed, and the minibuffer says:

    Uncompression program 'sh' not found

## Expected result

The Guix manual is displayed.

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