`bdt` assumes `mamba` to be in base environment

I have just installed bob.devtools to develop a local package. To not screw up my base environment, I have installed mamba and bob.devtools in a separate conda environment:

conda create -n bob-devel python=3.8 mamba -c conda-forge
conda activate bob-devel
mamba install bob.devtools -c https://www.idiap.ch/software/bob/conda/label/beta/ -c conda-forge

When I now want to build my-package, I get the following error message:

(bob-devel)$ bdt create -vv my-package
...
Traceback (most recent call last):
  File ".../miniconda/envs/ijbc/bin/bdt", line 11, in <module>
    sys.exit(main())
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/click/core.py", line 1128, in __call__
    return self.main(*args, **kwargs)
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/click/core.py", line 1053, in main
    rv = self.invoke(ctx)
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/click/core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/click/core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/click/core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/bob/devtools/scripts/bdt.py", line 43, in _decorator
    value = view_func(*args, **kwargs)
  File "/.../miniconda/envs/ijbc/lib/python3.8/site-packages/bob/devtools/scripts/create.py", line 272, in create
    conda_create(
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/bob/devtools/build.py", line 413, in conda_create
    envdir = get_env_directory(conda, name)
  File ".../miniconda/envs/ijbc/lib/python3.8/site-packages/bob/devtools/build.py", line 362, in get_env_directory
    output = subprocess.check_output(cmd)
  File ".../miniconda/envs/ijbc/lib/python3.8/subprocess.py", line 415, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File ".../miniconda/envs/ijbc/lib/python3.8/subprocess.py", line 493, in run
    with Popen(*popenargs, **kwargs) as process:
  File ".../miniconda/envs/ijbc/lib/python3.8/subprocess.py", line 858, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File ".../miniconda/envs/ijbc/lib/python3.8/subprocess.py", line 1704, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '.../miniconda/bin/mamba'

This seems that the script looks for mamba in the base environment, but actually it is only in my current environment:

(bob-devel)$ which mamba
.../miniconda/envs/bob-devel/bin/mamba

Is there a way to use mamba from my current environment?