From mboxrd@z Thu Jan  1 00:00:00 1970
From: Leo Famulari <leo@famulari.name>
Subject: Re: string-append plus package
Date: Thu, 8 Dec 2016 14:56:47 -0500
Message-ID: <20161208195647.GA23449@jasmine>
References: <d7fabec3-9f43-e315-2ede-680a12c7ba59@crazy-compilers.com>
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To: Hartmut Goebel <h.goebel@crazy-compilers.com>
Cc: help-guix@gnu.org

On Thu, Dec 08, 2016 at 06:01:37PM +0100, Hartmut Goebel wrote:
> Hi,
> 
> I'm confused about string-append working inconsistently:
> 
> In package definitions, I'm used to write '(string-append PKG "…")'. But
> when I use this for defining a service, I get an error:
> 
> In procedure string-append: Wrong type (expecting string): #<package
> nginx@1.11.6 gnu/packages/web.scm:124 42449c0>
> 
> What is going on here?
> 
> Here is the service-definition I use:
> 
>              (nginx-service #:vhost-list
>                (list (nginx-vhost-configuration     
>                       (root (string-append nginx "/share/nginx/html"))

I believe that file-append is intended for this use case.