ocaml - Opam says upgrade is not possible

Question

In particular, 'opam upgrade' produces this message:

"Upgrade is not possible because of conflicts or packages that are no longer available: - Conflicting query for package camlp4.4.02.1+system"

1) How might I get out of this situation?

2) How might I avoid having this happen again?

My opam is 1.2.2, and ocaml is 4.02.1. OS is linux mint (ubuntu derivative)

Answer 1

看起来目前 OCaml 存储库中存在一些不一致之处。也许你遇到的情况根本不是你的错。要解决此问题，您可以尝试手动删除或升级有冲突的软件包。其他方法只是从头开始，即删除您的交换机并重新安装所有需要的软件包。