How to fix this (properly)?
warning: creating dangling symlink `/nix/store/8pfbf9q0m2jrhhf5hswkskdbqwx7nlnb-python3-3.8.12-env//include/python3.8/python3.8m' -> `/nix/store/ksv01pa19hgnpyni4qvc90bq5y0y6n7g-python3-3.8.12/include/python3.8/python3.8m' -> `../python3.8m'
error: collision between `/nix/store/0p7wiycccampqhz2m32w0vag7p4d8vpy-python3.8-backports.entry-points-selectable-1.1.0/lib/python3.8/site-packages/backports/__pycache__/__init__.cpython-38.pyc' and `/nix/store/n3fkzwb6yx4a92gppdqq4yqfikjmr56n-python3.8-configparser-5.0.2/lib/python3.8/site-packages/backports/__pycache__/__init__.cpython-38.pyc'
warning: creating dangling symlink `/nix/store/6crw6sml2v6wv0s7max3bydfc0hry8iy-python3-3.8.12-env//include/python3.8/python3.8m' -> `/nix/store/ksv01pa19hgnpyni4qvc90bq5y0y6n7g-python3-3.8.12/include/python3.8/python3.8m' -> `../python3.8m'
builder for '/nix/store/dnq7h9466c6vyy8r3g5ixhlxkbq6nw4d-python3-3.8.12-env.drv' failed with exit code 25
error: build of '/nix/store/dnq7h9466c6vyy8r3g5ixhlxkbq6nw4d-python3-3.8.12-env.drv', '/nix/store/vppgi8i73sq23rwqs0qd019bcxdpc6zn-python3-3.8.12-env.drv' failed