Kei Kebreau <kei@openmailbox.org> writes:

> This patch allows Window Maker to run wmsetbg properly instead of
> showing an error as it has been.
> From a113116da6f9f6574e9fde12e69a9d3acdc87769 Mon Sep 17 00:00:00 2001
> From: Kei Kebreau <kei@openmailbox.org>
> Date: Sun, 23 Oct 2016 13:50:05 -0400
> Subject: [PATCH] gnu: windowmaker: Fix invocation of 'wmsetbg'.
>
> * gnu/packages/gnustep.scm (windowmaker)[arguments]: Add substitution of
> 40-character limit with a 107-character limit.
> ---
>  gnu/packages/gnustep.scm | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)

I haven't tested this, but the diff looks reasonable. Good catch. Any
chance you can submit this upstream as well?