Refactor packaging -> all nix code moves to argopkgs.

1 job for master in 0 seconds
Name Stage Failure
failed
argotk.build Build
Removing result
HEAD is now at ed4c7a0 nrm socket cleaning update
From https://xgitlab.cels.anl.gov/argo/argotk
ed4c7a0..56c4e53 master -> origin/master
Checking out 56c4e53c as master...
Skipping Git submodules setup
$ nix-build -A argotk
error: file 'argopkgs' was not found in the Nix search path (add it using $NIX_PATH or -I), at /var/lib/gitlab-runner/builds/d0216896/0/argo/argotk/default.nix:2:21
ERROR: Job failed: exit status 1