refmterr doesn't support Dune 2.0.0

[smorimoto]

error: build failed with exit code: 1
  build log:
    # esy-build-package: building: [email protected]
    # esy-build-package: pwd: /Users/username/.esy/source/i/refmterr__3.2.2__0adc653f
    # esy-build-package: running: 'dune' 'build' '-p' 'refmterr'
    File "src/refmterr/lib/dune", line 5, characters 15-21:
    5 |  (action  (run atdgen -j -j-std %{deps})))
                       ^^^^^^
    Error: Program atdgen not found in the tree or in PATH
     (context: default)
    File "src/refmterr/lib/dune", line 11, characters 15-21:
    11 |  (action  (run atdgen -t %{deps})))
                        ^^^^^^
    Error: Program atdgen not found in the tree or in PATH
     (context: default)
    error: command failed: 'dune' 'build' '-p' 'refmterr' (exited with 1)
    esy-build-package: exiting with errors above...

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