+ifeq (yes,$(shell config/bin/python -c "import xdist; print('yes')" 2>/dev/null))
+ # MAKEFLAGS must not be in an immediate := assignment
+ parallel_opt = $(lastword $(filter -j%,$(MAKEFLAGS)))
+ get_parallel_n = $(patsubst -j%,%,$(parallel_opt))
+ maybe_specific_n = $(if $(filter -j%,$(parallel_opt)),-n$(get_parallel_n))
+ xdist_opt = $(if $(filter -j,$(parallel_opt)),-nauto,$(maybe_specific_n))
+else
+ xdist_opt =
+endif
+