--- a/src/dune	2022-02-18 15:56:18.448932476 -0700
+++ b/src/dune	2022-02-18 15:57:07.165948459 -0700
@@ -11,6 +11,7 @@
  (libraries base_internalhash_types caml sexplib0 shadow_stdlib)
  (flags :standard -w -55)
  (c_flags :standard -D_LARGEFILE64_SOURCE (:include mpopcnt.sexp))
+ (c_library_flags -lm)
  (c_names exn_stubs int_math_stubs hash_stubs am_testing)
  (preprocess no_preprocessing)
  (lint