This patch comes from upstream:
https://gitlab.freedesktop.org/farstream/farstream/-/merge_requests/4

From 54987d445ea714b467d901b7daf8c09ed0644189 Mon Sep 17 00:00:00 2001
From: Debarshi Ray <debarshir@freedesktop.org>
Date: Thu, 12 Mar 2020 14:07:23 +0100
Subject: [PATCH] build: Adapt to backwards incompatible change in GNU Make 4.3

GNU Make 4.3 has a backwards incompatible change affecting the use of
number signs or hashes (ie., #) inside function invocations. See:
https://lists.gnu.org/archive/html/info-gnu/2020-01/msg00004.html

In this case, it would expand the '\#' in the '\n\#include \"$(h)\"'
argument to the foreach call to '\#', not '#'. This would lead to
spurious backslashes in front of the '#include' directives in the
generated fs-enumtypes.c file.

Spotted by Ernestas Kulik.
---
 common-modified/gst-glib-gen.mak | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common-modified/gst-glib-gen.mak b/common-modified/gst-glib-gen.mak
index 14f1ba37..2247a41c 100644
--- a/common-modified/gst-glib-gen.mak
+++ b/common-modified/gst-glib-gen.mak
@@ -6,7 +6,8 @@
 #glib_gen_prefix=gst_color_balance
 #glib_gen_basename=colorbalance
 
-enum_headers=$(foreach h,$(glib_enum_headers),\n\#include \"$(h)\")
+hash:=\#
+enum_headers=$(foreach h,$(glib_enum_headers),\n$(hash)include \"$(h)\")
 
 # these are all the rules generating the relevant files
 $(glib_gen_basename)-enumtypes.h: $(glib_enum_headers)
-- 
GitLab

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<div class='path'>path: <a href='/guix/log/?id=ab28aa229bff7af49ee9a413366000dd61755878'>root</a>/<a href='/guix/log/gnu?id=ab28aa229bff7af49ee9a413366000dd61755878'>gnu</a>/<a href='/guix/log/gnu/packages?id=ab28aa229bff7af49ee9a413366000dd61755878'>packages</a>/<a href='/guix/log/gnu/packages/ed.scm?id=ab28aa229bff7af49ee9a413366000dd61755878'>ed.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/ed.scm?id=ab28aa229bff7af49ee9a413366000dd61755878&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2017-04-03 14:51:49 +0200'>2017-04-03</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=1f044d7a910bfe6b3aa264e876418f4a96e0aece'>gnu: ed: Update to 1.14.2.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2017-01-12 23:28:59 +0100'>2017-01-12</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=e9384e3b746eb96beea6d3a9dce5f504825e8baa'>gnu: ed: Update to 1.14.1.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2016-02-15 10:17:46 +0200'>2016-02-15</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=ff0c847687ce796d61c94ca07ffa6d646339d095'>gnu: ed: Use 'modify-phases'.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2016-02-15 10:17:45 +0200'>2016-02-15</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=5cd2c1e8c1dc3b0a18c2c6d4f2432b81e3a55f75'>gnu: ed: Update to 1.13.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2015-07-10 23:47:08 -0400'>2015-07-10</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=302af59fc14c6dc3686a24d4e11429f719c0c7d1'>gnu: ed: Update to 1.12.</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2015-04-04 03:46:55 -0400'>2015-04-04</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=353fda815e8b7863408857048aff224bbd0716d5'>gnu: ed: Update to 1.11.</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>