This one?

Author: hebasto

ci/scripts/ci.sh

@@ -15,6 +15,8 @@ if command -v clang-tidy >/dev/null 2>&1; then
   clang-tidy --version
 fi
 
+export LDFLAGS="-lc++ -lc++abi"
+
 cmake -B "$CI_DIR" "${CMAKE_ARGS[@]+"${CMAKE_ARGS[@]}"}" || cat "${CI_DIR}/CMakeFiles/CMakeConfigureLog.yaml"
 cmake --build "$CI_DIR" -t all tests mpexamples -- "${BUILD_ARGS[@]+"${BUILD_ARGS[@]}"}"
 ctest --test-dir "$CI_DIR" --output-on-failure

shell.nix

@@ -11,7 +11,6 @@ in mkShell {
   buildInputs = [
     capnproto
     llvm.libcxx
-    pkgs.libpthread
   ];
   nativeBuildInputs = with pkgs; [
     cmake