Issue description

This causes undesired runtime dependencies. For example, system-config-printer has a runtime dependency on curl.dev, because pycurl has curl as a propagated build input:

$ nix-build -A system-config-printer
/nix/store/m327x6b9indnxr9a1jmp6rzx9qjiccmq-system-config-printer-1.5.7

$ nix-store -q --references ./result | grep dev
/nix/store/915rpb4ikll4nbl5y7kihdg7c445jzgb-curl-7.53.1-dev

In general, wrapper generators should not arbitrarily inject all build-time dependencies into the wrapper script.

Technical details

• Nixpkgs version: NixOS 17.09 acb7958