volume setup for caching basilisk infrastructure?

The docker-compose item in README tells how to map a local folder to a volume for storing installed packages. As we expand the scope of Bioc-python interactions, it may be of interest to store, locally, the conda resources managed by basilisk. I have tried this out with -v $HOME/dockrcache_314:/root/.cache but ran into:

> example(basiliskRun)

bslskR> ## Don't show: 
bslskR> basilisk.utils::installConda()
PREFIX=/root/.cache/R/basilisk/1.5.0/0
Unpacking payload ...
Collecting package metadata (current_repodata.json): done                                                         
Solving environment: done

## Package Plan ##

  environment location: /root/.cache/R/basilisk/1.5.0/0

  added / updated specs:
    - _libgcc_mutex==0.1=main
    - ca-certificates==2020.1.1=0
    - certifi==2020.4.5.1=py37_0
    - cffi==1.14.0=py37he30daa8_1
    - chardet==3.0.4=py37_1003
    - conda-package-handling==1.6.1=py37h7b6447c_0
    - conda==4.8.3=py37_0
    - cryptography==2.9.2=py37h1ba5d50_0
    - idna==2.9=py_1
    - ld_impl_linux-64==2.33.1=h53a641e_7
    - libedit==3.1.20181209=hc058e9b_0
    - libffi==3.3=he6710b0_1
    - libgcc-ng==9.1.0=hdf63c60_0
    - libstdcxx-ng==9.1.0=hdf63c60_0
    - ncurses==6.2=he6710b0_1
    - openssl==1.1.1g=h7b6447c_0
    - pip==20.0.2=py37_3
    - pycosat==0.6.3=py37h7b6447c_0
    - pycparser==2.20=py_0
    - pyopenssl==19.1.0=py37_0
    - pysocks==1.7.1=py37_0
    - python==3.7.7=hcff3b4d_5
    - readline==8.0=h7b6447c_0
    - requests==2.23.0=py37_0
    - ruamel_yaml==0.15.87=py37h7b6447c_0
    - setuptools==46.4.0=py37_0
    - six==1.14.0=py37_0
    - sqlite==3.31.1=h62c20be_1
    - tk==8.6.8=hbc83047_0
    - tqdm==4.46.0=py_0
    - urllib3==1.25.8=py37_0
    - wheel==0.34.2=py37_0
    - xz==5.2.5=h7b6447c_0
    - yaml==0.1.7=had09818_2
    - zlib==1.2.11=h7b6447c_3

The following NEW packages will be INSTALLED:

  _libgcc_mutex      pkgs/main/linux-64::_libgcc_mutex-0.1-main
  ca-certificates    pkgs/main/linux-64::ca-certificates-2020.1.1-0
  certifi            pkgs/main/linux-64::certifi-2020.4.5.1-py37_0
  cffi               pkgs/main/linux-64::cffi-1.14.0-py37he30daa8_1
  chardet            pkgs/main/linux-64::chardet-3.0.4-py37_1003
  conda              pkgs/main/linux-64::conda-4.8.3-py37_0
  conda-package-han~ pkgs/main/linux-64::conda-package-handling-1.6.1-py37h7b6447c_0
  cryptography       pkgs/main/linux-64::cryptography-2.9.2-py37h1ba5d50_0
  idna               pkgs/main/noarch::idna-2.9-py_1
  ld_impl_linux-64   pkgs/main/linux-64::ld_impl_linux-64-2.33.1-h53a641e_7
  libedit            pkgs/main/linux-64::libedit-3.1.20181209-hc058e9b_0
  libffi             pkgs/main/linux-64::libffi-3.3-he6710b0_1
  libgcc-ng          pkgs/main/linux-64::libgcc-ng-9.1.0-hdf63c60_0
  libstdcxx-ng       pkgs/main/linux-64::libstdcxx-ng-9.1.0-hdf63c60_0
  ncurses            pkgs/main/linux-64::ncurses-6.2-he6710b0_1
  openssl            pkgs/main/linux-64::openssl-1.1.1g-h7b6447c_0
  pip                pkgs/main/linux-64::pip-20.0.2-py37_3
  pycosat            pkgs/main/linux-64::pycosat-0.6.3-py37h7b6447c_0
  pycparser          pkgs/main/noarch::pycparser-2.20-py_0
  pyopenssl          pkgs/main/linux-64::pyopenssl-19.1.0-py37_0
  pysocks            pkgs/main/linux-64::pysocks-1.7.1-py37_0
  python             pkgs/main/linux-64::python-3.7.7-hcff3b4d_5
  readline           pkgs/main/linux-64::readline-8.0-h7b6447c_0
  requests           pkgs/main/linux-64::requests-2.23.0-py37_0
  ruamel_yaml        pkgs/main/linux-64::ruamel_yaml-0.15.87-py37h7b6447c_0
  setuptools         pkgs/main/linux-64::setuptools-46.4.0-py37_0
  six                pkgs/main/linux-64::six-1.14.0-py37_0
  sqlite             pkgs/main/linux-64::sqlite-3.31.1-h62c20be_1
  tk                 pkgs/main/linux-64::tk-8.6.8-hbc83047_0
  tqdm               pkgs/main/noarch::tqdm-4.46.0-py_0
  urllib3            pkgs/main/linux-64::urllib3-1.25.8-py37_0
  wheel              pkgs/main/linux-64::wheel-0.34.2-py37_0
  xz                 pkgs/main/linux-64::xz-5.2.5-h7b6447c_0
  yaml               pkgs/main/linux-64::yaml-0.1.7-had09818_2
  zlib               pkgs/main/linux-64::zlib-1.2.11-h7b6447c_3

Preparing transaction: done
Executing transaction: done
ERROR conda.core.link:_execute(698): An error occurred while installing package 'defaults::ncurses-6.2-he6710b0_1'.

CondaError: Cannot link a source that does not exist. /root/.cache/R/basilisk/1.5.0/0/pkgs/ncurses-6.2-he6710b0_1/share/terminfo/E/Eterm-color
Running `conda clean --packages` may resolve your problem.
()

Error in basilisk.utils::installConda() : 
  conda installation failed with status code '1'

If I remove that -v setting, the example runs fine, but the conda environment is built from scratch. That's what I am hoping to avoid. @LTLA might have a comment?

Bioconductor / bioconductor_docker

volume setup for caching basilisk infrastructure? #33