upgrading.
This fixes a bug reported by Martin:
$ nix-env -i foo-1.0
$ nix-env -u foo-1.0
upgrading foo-1.0 to foo-1.1
upgrading.
This fixes a bug reported by Martin:
$ nix-env -i foo-1.0
$ nix-env -u foo-1.0
upgrading foo-1.0 to foo-1.1