store path mismatch in file downloaded from

[srghma]

 ~/projects/nix-deploy   master  nix-build ./release.nix
error: store path mismatch in file downloaded from 'https://github.com/NixOS/nixpkgs/archive/74286ec9e76be7cd00c4247b9acb430c4bd9f1ce.tar.gz'
(use '--show-trace' to show detailed location information)


 ~/projects/nix-deploy   master ✚  nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 4.14.59, NixOS, 18.03.133029.d0c868ec17c (Impala)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.0.4`
 - channels(srghma): `"terraform-0.11.7, nix-diff-1.0.1, intero-0.1.20.drv, libreoffice-6.0.2.1, icedtea-web-1.6.2, xkbcomp-1.4.0, qtox-1.13.0, utox-0.16.1, bfg-repo-cleaner, jq-1.5, firefox-60.0.2esr, home-manager-path, python3-3.6.5, sqlitebrowser-3.10.1"`
 - channels(root): `"nixos-18.03, nixpkgs-unstable-18.09pre147772.d1ae60cbad7"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs`

 ~/projects/nix-deploy   master ✚  git rev-parse HEAD
08b349910d75e0e97c867d84422951f5f6a123b0

[ixmatus]

Fixed by #19.