Motivation for this change

nix-community/nixpkgs-update#62

Address some of the failed builds from https://gist.github.com/ryantm/0434bbae8f5455c617259725b3fce6fc/raw

Things done

All packages have been tested for 2.7, 3.6. Every effort was taken to add tests if there were included with the release. Will probably have to move to staging

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.