SDL2 build failure

gistfile1.txt

error: build failed with exit code: 1
  build log:
    # esy-build-package: building: [email protected]
    # esy-build-package: pwd: /Users/jwalke/.esy/source/i/reason_sdl2__2.10.3018__dacc7a39
    # esy-build-package: running: 'dune' 'build' '-p' 'sdl2'
             gcc src/sdl2_wrapper.o (exit 1)
    (cd /Users/jwalke/.esy/3/b/reason_sdl2-2.10.3018-5aa8652b/default/src && /usr/bin/gcc -I /Users/jwalke/.esy/3__________________________________________________________________/i/ocaml-4.9.0-27f2b357/lib/ocaml -I /Users/jwalke/.esy/3__________________________________________________________________/i/esy_sdl2-2.0.10005-690e644d/include -I /Users/jwalke/.esy/source/i/reason_sdl2__2.10.3018__dacc7a39/include -I /Users/jwalke/.esy/source/i/reason_sdl2__2.10.3018__dacc7a39/src -x objective-c++ -g -o sdl2_wrapper.o -c sdl2_wrapper.cpp)
    sdl2_wrapper.cpp:1241:24: error: assigning to 'value *' (aka 'long *') from incompatible type 'const value *' (aka 'const long *')
        reason_sdl_onLog = caml_named_value("reason_sdl2_onLog");
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1 error generated.
    error: command failed: 'dune' 'build' '-p' 'sdl2' (exited with 1)
    esy-build-package: exiting with errors above...

  building [email protected]
esy: exiting due to errors above