From mboxrd@z Thu Jan  1 00:00:00 1970
From: Danny Milosavljevic <dannym@scratchpost.org>
Subject: Re: [PATCH -v2 2/2] guix: profiles: create fonts.dir/scale for all
	fonts directories
Date: Tue, 7 Mar 2017 21:24:52 +0100
Message-ID: <20170307212452.2ddda246@scratchpost.org>
References: <20170307110749.31614-1-huang.ying.caritas@gmail.com>
	<20170307110749.31614-2-huang.ying.caritas@gmail.com>
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To: Huang Ying <huang.ying.caritas@gmail.com>
Cc: guix-devel@gnu.org

Hi,

> +                            (with-directory-excursion dir
> +                              (and (file-exists? fonts-scale-file)
> +                                   (delete-file fonts-scale-file))
> +                              (and (file-exists? fonts-dir-file)
> +                                   (delete-file fonts-dir-file))
> +                              (system* mkfontscale)
> +                              (system* mkfontdir)

Please do not throw away the status code here (result of system*). You can check for okayness by (zero? (system* ...)).