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
-)
5d2'>tree</a><a href='/guix/commit/scripts?id=9759dd1a8af33490aad96cf5ff53855618ff25d2'>commit</a><a href='/guix/diff/scripts?id=9759dd1a8af33490aad96cf5ff53855618ff25d2'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/scripts'>
<input type='hidden' name='id' value='9759dd1a8af33490aad96cf5ff53855618ff25d2'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=9759dd1a8af33490aad96cf5ff53855618ff25d2'>root</a>/<a href='/guix/log/scripts?id=9759dd1a8af33490aad96cf5ff53855618ff25d2'>scripts</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/scripts?id=9759dd1a8af33490aad96cf5ff53855618ff25d2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-06-09 12:02:27 +0200'>2018-06-09</span></td><td><a href='/guix/commit/scripts?id=75e24d7b0e19ab2164aecb340e82d07d2b9714e7'>pull: Install the new Guix in a profile.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-28 23:14:55 +0100'>2018-01-28</span></td><td><a href='/guix/commit/scripts?id=63666a348af5ef5190cbe9611c40f2b9188b7967'>guix: Let Emacs detect “scripts/guix.in” appropriate mode.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2018-01-23 15:01:15 +0100'>2018-01-23</span></td><td><a href='/guix/commit/scripts?id=6f774d481839f87178c5895ac2d661e141f879b8'>guix: Refactor script.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2018-01-23 10:13:16 +0100'>2018-01-23</span></td><td><a href='/guix/commit/scripts?id=cba386c1295b7054df22dfb4662b1b92f668e2c0'>build: Expand ‘scripts/guix’ at Make time.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2017-03-20 23:26:18 +0100'>2017-03-20</span></td><td><a href='/guix/commit/scripts?id=9437fd7399425ed281e1bfc13240288ba9078caa'>build: Install .go files to $libdir/guile/X.Y.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>