This patch was borrowed from Debian's package:
https://salsa.debian.org/debian-astro-team/aoflagger/-/blob/0484ef75a663e3e07738550cdade46f433a53dac/debian/patches/Use-system-provided-pybind11.patch
Description: Use system provided pybind11
Author: Ole Streicher <olebole@debian.org>
Origin: Debian
Last-Update: Mon, 30 Aug 2021 11:05:37 +0200
---
 CMakeLists.txt | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 655ea5e..824ee2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,11 +62,6 @@ foreach(ExternalSubmodule IN LISTS ExternalSubmoduleDirectories)
   endif()
 endforeach()
 
-# Include aocommon/pybind11 headers
-include_directories("${CMAKE_SOURCE_DIR}/external/aocommon/include")
-add_subdirectory("${CMAKE_SOURCE_DIR}/external/pybind11")
-include_directories(SYSTEM ${pybind11_INCLUDE_DIR})
-
 find_package(
   HDF5
   COMPONENTS C CXX
@@ -101,6 +96,11 @@ find_package(PythonInterp REQUIRED)
 message(STATUS "Using python version ${PYTHON_VERSION_STRING}")
 include_directories(SYSTEM ${PYTHON_INCLUDE_DIRS})
 
+# Include pybind11 headers
+find_package(pybind11 REQUIRED)
+include_directories("${CMAKE_SOURCE_DIR}/external/aocommon/include")
+include_directories(${pybind11_INCLUDE_DIR})
+
 # boost::alignment requires Boost 1.56
 find_package(Boost 1.56.0 REQUIRED COMPONENTS date_time filesystem system
                                               unit_test_framework)
diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/guix-shell.sh'>
<input type='hidden' name='id' value='ff512401c30e7f1dbda39a49930274f83e2da411'/><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=ff512401c30e7f1dbda39a49930274f83e2da411'>root</a>/<a href='/guix/log/tests?id=ff512401c30e7f1dbda39a49930274f83e2da411'>tests</a>/<a href='/guix/log/tests/guix-shell.sh?id=ff512401c30e7f1dbda39a49930274f83e2da411'>guix-shell.sh</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/guix-shell.sh?id=ff512401c30e7f1dbda39a49930274f83e2da411&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-09-04 23:10:10 +0200'>2022-09-04</span></td><td><a href='/guix/commit/tests/guix-shell.sh?id=7a2acbdc5a9eed7c5dc3fe947f54fbebd89c0892'>store: Open daemon connections with SOCK_CLOEXEC.</a><span class='msg-avail'>...<span class='msg-tooltip'>Previously, 'guix shell' for example would leak the socket that's
connected to the daemon.

* guix/store.scm (open-unix-domain-socket, open-inet-socket): Pass
SOCK_CLOEXEC to 'socket'.
* tests/guix-shell.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-02-18 14:14:38 +0100'>2022-02-18</span></td><td><a href='/guix/commit/tests/guix-shell.sh?id=5a57313918a5c1bd5cf8238c2dcae64a03523952'>profiles: 'profile-derivation' rejects unsupported packages.</a><span class='msg-avail'>...<span class='msg-tooltip'>Previously user-facing commands would happily start building packages
even if they do not support that system.  With this change, all the
user-facing commands reject unsupported packages without going further.

* guix/profiles.scm (profile-derivation): Add #:allow-unsupported-packages?.
Define 'check-supported-packages' and honor #:allow-unsupported-packages?.
* tests/guix-pack.sh, tests/guix-package.sh, tests/guix-shell.sh: Ensure
that unsupported packages are rejected.
* tests/guix-system.sh: Pass "--system=armhf-linux" when attempting to
build gnu/system/examples/asus-c201.tmpl.
</span></span></td><td>Ludovic Courtès</td></tr>