Build fails on checkout

[golergka]

Macos 11.2.3, esy 0.6.10, freshly checked out repository:

$ esy
info esy 0.6.10 (using package.json)
info fetching: done
info installing: done
info building @esy-ocaml/substs@0.0.1@d41d8cd9
info building ocaml@4.10.0@d41d8cd9
info building @esy-ocaml/substs@0.0.1@d41d8cd9: done
info building @opam/conf-m4@opam:1@3b2b148a
info building @opam/base-unix@opam:base@87d0b2eb
info building @opam/base-threads@opam:base@36803084
info building @opam/base-unix@opam:base@87d0b2eb: done
info building @opam/base-threads@opam:base@36803084: done
info building @opam/conf-m4@opam:1@3b2b148a: done
error: build failed with exit code: 1
  build log:
    # esy-build-package: building: ocaml@4.10.0
    # esy-build-package: pwd: /Users/golergka/.esy/3/b/ocaml-4.10.0-f28f0ffe

  building ocaml@4.10.0
esy: exiting due to errors above

[coryzibell]

Looks like this is an upstream error for ocaml versions <4.13

ocaml/ocaml#10266