Serial line lock directory

[Danny Milosavljevic <dannym@scratchpost.org>]

Hi,

I'm trying to package minicom and there I get an error message 

  checking for com line lock directory... configure: error: No suitable lock directory

... which was checking for a (common) directory to put a file in (as a marker) when a serial device is in use (and removing the file to free the serial device).  This is supposed to prevent multiple different programs accidentally using the same serial line.

Where and how should this be done in Guix?

To reproduce:

diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index 7ad93653e..fc6e4068c 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -44,6 +44,7 @@
   #:use-module (gnu packages curl)
   #:use-module (gnu packages flex)
   #:use-module (gnu packages fontutils)
+  #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages gd)
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages ghostscript)
@@ -812,3 +813,21 @@ the 'showing the effect of'-style of operation.")
 for mathematical functions.  It also provides an machine-independent
 interface to select the best such procedures to use on a given system.")
     (license license:gpl3+)))
+
+(define-public minicom
+  (package
+    (name "minicom")
+    (version "2.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://alioth.debian.org/frs/download.php/"
+                           "file/4215/" name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1wa1l36fa4npd21xa9nz60yrqwkk5cq713fa3p5v0zk7g9mq6bsk"))))
+    (build-system gnu-build-system)
+    (home-page "https://alioth.debian.org/projects/minicom/")
+    (synopsis "Serial terminal emulator")
+    (description "@code{minicom} is a serial terminal emulator.")
+    (license license:gpl2+)))