python.pkgs.imread: inherit native libs on callsite
python.pkgs.imread: inherit native libs on callsite

this avoids potential namespace collisions between python libs
and packages from all-packags.nix:

https://github.com/NixOS/nixpkgs/pull/61033#issuecomment-489926103

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs