Support to build ros_comm in nix sandbox

[akru]

The problem

Currently building something with catkin fails when sandbox is enabled.

Affected

• https://github.com/airalab/airapkgs @akru

Related issues

• catkin fails to build #67

[akru]

@nschoe Currently I try to build catkin package only in sandbox and have error around build scripts because /usr/bin/env is out of scope in nix sandbox.

[nschoe]

@akru hum okay. But I thought we needed to disable sandbox building in configuration.nix as per your answer in #67 . So what do you mean when you say you are building catkin in a sandbox?

[akru]

Error reproduce scenario is:

1. I turn ON nix sandbox in /etc/nixos/configuration.nix

{ nix.useSandbox = true; }

2. cd airapkgs && nix-build -A catkin

without enabling sandbox build is ok.

[nschoe]

Oh, right. I understand now.