Error:

installing 'python3-3.7.4-env'
these derivations will be built:
  /nix/store/73l19s34n5wvskjss454y8hgmyg717y6-python3-3.7.4-env.drv
building '/nix/store/73l19s34n5wvskjss454y8hgmyg717y6-python3-3.7.4-env.drv'...
collision between `/nix/store/jcb40lq7xlm9dng29yzczk4d90gg527f-python3.7-dask-2.2.0/lib/python3.7/site-packages/dask/utils_test.py' and `/nix/store/m85vg42rdw2s3v59ilv5pwnf74pzvm9q-python3.7-dask-2.5.2/lib/python3.7/site-packages/dask/utils_test.py'
builder for '/nix/store/73l19s34n5wvskjss454y8hgmyg717y6-python3-3.7.4-env.drv' failed with exit code 25
error: build of '/nix/store/73l19s34n5wvskjss454y8hgmyg717y6-python3-3.7.4-env.drv' failed

Expression:

with import <nixpkgs> {};

python37.withPackages (ps: with ps; [nur.repos.awl-fcarza.dask_2_5_2 nur.repos.awl-fcarza.dask-ml_1_0_0 scikitlearn numpy pand$