Tim Steinbach ccb2dead1b
Fix tarball builds
Do not refer to <nixpkgs> as it will produce the following message:

"evaluation aborted with the following error message: 'Illegal use of <nixpkgs> in Nixpkgs.'"
2018-11-13 14:48:15 -05:00
..
2018-11-13 14:48:15 -05:00