diff -Nru pygalmesh-0.10.6/debian/changelog pygalmesh-0.10.6/debian/changelog
--- pygalmesh-0.10.6/debian/changelog	2022-01-26 16:21:20.000000000 +0000
+++ pygalmesh-0.10.6/debian/changelog	2022-04-23 15:15:39.000000000 +0000
@@ -1,3 +1,9 @@
+pygalmesh (0.10.6-1+rpi1) bookworm-staging; urgency=medium
+
+  * Link with libatomic.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sat, 23 Apr 2022 15:15:39 +0000
+
 pygalmesh (0.10.6-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru pygalmesh-0.10.6/debian/patches/link-with-libatomic.patch pygalmesh-0.10.6/debian/patches/link-with-libatomic.patch
--- pygalmesh-0.10.6/debian/patches/link-with-libatomic.patch	1970-01-01 00:00:00.000000000 +0000
+++ pygalmesh-0.10.6/debian/patches/link-with-libatomic.patch	2022-04-23 15:15:39.000000000 +0000
@@ -0,0 +1,29 @@
+Description:  Link with libatomic.
+Author: Peter Michael Green <plugwash@raspbian.org>
+
+Index: pygalmesh-0.10.6/src/CMakeLists.txt
+===================================================================
+--- pygalmesh-0.10.6.orig/src/CMakeLists.txt
++++ pygalmesh-0.10.6/src/CMakeLists.txt
+@@ -13,7 +13,7 @@ FILE(GLOB pygalmesh_SRCS "${CMAKE_CURREN
+ pybind11_add_module(pygalmesh ${pygalmesh_SRCS})
+ 
+ # ADD_LIBRARY(pygalmesh ${pygalmesh_SRCS})
+-target_link_libraries(pygalmesh PRIVATE ${CGAL_LIBRARIES})
++target_link_libraries(pygalmesh PRIVATE ${CGAL_LIBRARIES} -latomic)
+ 
+ # https://github.com/CGAL/cgal/issues/6002
+ # find_program(iwyu_path NAMES include-what-you-use iwyu REQUIRED)
+Index: pygalmesh-0.10.6/setup.py
+===================================================================
+--- pygalmesh-0.10.6.orig/setup.py
++++ pygalmesh-0.10.6/setup.py
+@@ -27,7 +27,7 @@ ext_modules = [
+             "/usr/local/include/eigen3",
+         ],
+         # no CGAL libraries necessary from CGAL 5.0 onwards
+-        libraries=["gmp", "mpfr"],
++        libraries=["gmp", "mpfr","atomic"],
+     )
+ ]
+ 
diff -Nru pygalmesh-0.10.6/debian/patches/series pygalmesh-0.10.6/debian/patches/series
--- pygalmesh-0.10.6/debian/patches/series	2022-01-26 16:21:20.000000000 +0000
+++ pygalmesh-0.10.6/debian/patches/series	2022-04-23 15:15:39.000000000 +0000
@@ -1 +1,2 @@
 test_relax_tolerance.patch
+link-with-libatomic.patch