Without the change build fails on `master` against `gcc-13` as
https://hydra.nixos.org/build/246505636:
mapper/../common/defs.h:53:9: error: 'uint32_t' does not name a type
53 | typedef uint32_t ref_pos_t;
| ^~~~~~~~
mapper/../common/defs.h:35:1: note: 'uint32_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
34 | #include <string>
+++ |+#include <cstdint>