Building URLs doesn't work reliably with alternate stores

[lheckemann]

% nix-build -f https://github.com/lheckemann/numptyphysics/archive/master.zip --store /tmp/nix
[1.1/0.0 MiB DL] downloading 'https://github.com/lheckemann/numptyphysics/archive/master.zip'tar: /nix/store/qmr3gvvb4g0bx6pdk0m7kk16g4zl2avy-master.zip: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
[1.1 MiB DL]
error: program 'tar' failed with exit code 2

This seems to be because it attempts to extract the tarball which has been downloaded to /tmp/nix/nix/store/… as if it were in /nix/store/….

[edolstra]

This is fixed in 0995763. Note however that Nix does not support zip files. You need to use master.tar.gz, e.g.

$ nix-build https://github.com/lheckemann/numptyphysics/archive/master.tar.gz --store ~/my-nix/
these derivations will be built:
  /nix/store/bwq1rdykgi0i95v6sm8zln5cf45mv82m-numptyphysics.drv
...

[lheckemann]

Whoops, yes, that was my mistake in copying and pasting.

The same problem still exists with ssh-ng though presumably?

[edolstra]

Yes, that's not easy to fix though.