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=e7a6a6f1fb47d1b165e880feb21fa3e90ab7f176'>root</a>/<a href='/guix/log/build-aux?id=e7a6a6f1fb47d1b165e880feb21fa3e90ab7f176'>build-aux</a>/<a href='/guix/log/build-aux/convert-xref.scm?id=e7a6a6f1fb47d1b165e880feb21fa3e90ab7f176'>convert-xref.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/build-aux/convert-xref.scm?id=e7a6a6f1fb47d1b165e880feb21fa3e90ab7f176&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-10-17 18:26:44 +0200'>2021-10-17</span></td><td><a href='/guix/commit/build-aux/convert-xref.scm?id=0623138ffa5b066afc25547ffdeb97753cb0ee9a'>maint: Factorize po xref translation.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>