This patch was borrowed from Debian's package:
https://salsa.debian.org/multimedia-team/ableton-link/-/blob/9c65141bf5bba0872811c179af77ac95770352cc/debian/patches/DEBIAN_system_libraries.patch
Description: Drop dependencies on included 3rd-party libs
 upstream includes git-submodules for Catch and ASIO (not found in the tarball).
 on Debian we want to use the system provided libraries.
Author: IOhannes m zmölnig
Origin: Debian
Forwarded: not-needed
Last-Update: 2016-10-26
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
--- ableton-link.orig/cmake_include/AsioStandaloneConfig.cmake
+++ ableton-link/cmake_include/AsioStandaloneConfig.cmake
@@ -1,6 +1,2 @@
 add_library(AsioStandalone::AsioStandalone IMPORTED INTERFACE)
 
-set_property(TARGET AsioStandalone::AsioStandalone APPEND PROPERTY
-  INTERFACE_INCLUDE_DIRECTORIES
-  ${CMAKE_CURRENT_LIST_DIR}/../modules/asio-standalone/asio/include
-)
--- ableton-link.orig/cmake_include/CatchConfig.cmake
+++ ableton-link/cmake_include/CatchConfig.cmake
@@ -1,6 +1,2 @@
 add_library(Catch::Catch IMPORTED INTERFACE)
 
-set_property(TARGET Catch::Catch APPEND PROPERTY
-  INTERFACE_INCLUDE_DIRECTORIES
-  ${CMAKE_SOURCE_DIR}/third_party/catch
-)
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<div class='path'>path: <a href='/guix/log/?id=bf933e4f11bf0126f2d6038f5c65c55080f27a0e'>root</a>/<a href='/guix/log/tests?id=bf933e4f11bf0126f2d6038f5c65c55080f27a0e'>tests</a>/<a href='/guix/log/tests/build-emacs-utils.scm?id=bf933e4f11bf0126f2d6038f5c65c55080f27a0e'>build-emacs-utils.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/tests/build-emacs-utils.scm?id=bf933e4f11bf0126f2d6038f5c65c55080f27a0e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-07-13 10:49:40 -0400'>2022-07-13</span></td><td><a href='/guix/commit/tests/build-emacs-utils.scm?id=dcf133587ac7d73ba306a314e1a496a7efb9960b'>tests: build-emacs-utils: Allow test to pass on Emacs 27 too.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/build-emacs-utils.scm
("emacs-batch-script: raise &amp;emacs-batch-error on failure"): More loosely
match expected error string, which differs between Emacs 27 and Emacs 28.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-06-17 23:39:32 +0200'>2022-06-17</span></td><td><a href='/guix/commit/tests/build-emacs-utils.scm?id=c3afbd05bf541b31b122e6093ff10eabf6a47926'>guix: emacs-utils: Add emacs-header-parse.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/emacs-utils.scm (emacs-header-parse): New procedure.

* tests/build-emacs-utils.scm ("emacs-header-parse: fetch version",
  "emacs-header-parse: fetch keywords", "emacs-header-parse: fetch
  nonexistent author"): New tests.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Fredrik Salomonsson</td></tr>
<tr><td><span title='2022-06-17 23:39:31 +0200'>2022-06-17</span></td><td><a href='/guix/commit/tests/build-emacs-utils.scm?id=f8275916fc6fcb3dd9bd8ef7dc4ddce2dca98c7d'>guix: emacs-utils: Add emacs-batch-script.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/emacs-utils.scm (emacs-batch-script): New procedure.

* tests/build-emacs-utils.scm: New file.

* Makefile.am (TESTS): Add `tests/build-emacs-utils.scm'.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Fredrik Salomonsson</td></tr>