$ nix-build -E 'with import <nixpkgs> { }; python3.withPackages(ps: with ps; [ qiskit ])' -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz
these derivations will be built:
/nix/store/qb8p751z89d71c9vhlvzmvfx648wwpk1-python3-3.8.6-env.drv
building '/nix/store/qb8p751z89d71c9vhlvzmvfx648wwpk1-python3-3.8.6-env.drv'...
collision between `/nix/store/dvrwcv11zj5maiv6h5nh90ghp9j1xnf6-python3.8-python-constraint-1.4.0/lib/python3.8/site-packages/examples/__pycache__/__init__.cpython-38.pyc' and `/nix/store/0d06l97hgw9yrn6z3bjxjxq987nfrbcx-python3.8-cvxpy-1.1.7/lib/python3.8/site-packages/examples/__pycache__/__init__.cpython-38.pyc'
builder for '/nix/store/qb8p751z89d71c9vhlvzmvfx648wwpk1-python3-3.8.6-env.drv' failed with exit code 25
error: build of '/nix/store/qb8p751z89d71c9vhlvzmvfx648wwpk1-python3-3.8.6-env.drv' failed
I create new issue as recommened. Originally posted by @wizzup in https://github.com/NixOS/nixpkgs/issues/81482#issuecomment-760950350