nix-matrix-test

```
centos-6-install    + curl /nix/store/5q66f5vcd990ac9948ml027nn4k847vd-nix-2.3pre6621_92d08c0
centos-6-install    + sh
centos-6-install
centos-6-install    curl: (3) <url> malformed
centos-6-test-login    Starting: testnixinfo
centos-6-test-login         ./testscript::runtest::39 testnixinfo
centos-6-test-login         ./testscript::testnixinfo::8 nix-shell -p nix-info --run 'nix-info -m'
centos-6-test-login        ./testscript: line 8: nix-shell: command not found
centos-6-test-login    Finishing: testnixinfo, duration:0 result:1
centos-6-test-login    Starting: testshell
centos-6-test-login         ./testscript::runtest::39 testshell
centos-6-test-login         ./testscript::testshell::12 nix-shell -p hello --run hello
centos-6-test-login        ./testscript: line 12: nix-shell: command not found
centos-6-test-login    Finishing: testshell, duration:0 result:1
centos-6-test-login    Starting: testnixenv
centos-6-test-login         ./testscript::runtest::39 testnixenv
centos-6-test-login         ./testscript::testnixenv::16 nix-env -iA nixpkgs.hello
centos-6-test-login        ./testscript: line 16: nix-env: command not found
centos-6-test-login    Finishing: testnixenv, duration:0 result:1
centos-6-test-login    Starting: testnixchannel
centos-6-test-login         ./testscript::runtest::39 testnixchannel
centos-6-test-login         ./testscript::testnixchannel::22 nix-channel --add https://nixos.org/channels/nixos-18.03 nixos-18-03
centos-6-test-login        ./testscript: line 22: nix-channel: command not found
centos-6-test-login    Finishing: testnixchannel, duration:0 result:1
centos-6-test-login-interactive    bash: cannot set terminal process group (-1): Invalid argument
centos-6-test-login-interactive    bash: no job control in this shell
centos-6-test-login-interactive    Starting: testnixinfo
centos-6-test-login-interactive         ./testscript::runtest::10 testnixinfo
centos-6-test-login-interactive         ./testscript::testnixinfo::-40 nix-shell -p nix-info --run 'nix-info -m'
centos-6-test-login-interactive        bash: nix-shell: command not found
```