我正在尝试将我为 haskell 堆栈安装的 ghc 版本从 8.0.2 版更新到 8.2.1 版，但似乎我遗漏了一些东西。
[user@localhost ~]$ stack --resolver ghc-8.2.1 setup
stack will use a sandboxed GHC it installed
For more information on paths, see 'stack path' and 'stack exec env'
To use this GHC and packages outside of a project, consider using:
stack ghc, stack ghci, stack runghc, or stack exec
[user@localhost ~]$ stack ghci
Configuring GHCi with the following packages:
GHCi, version 8.0.2: http://www.haskell.org/ghc/ :? for help
Loaded GHCi configuration from /tmp/ghci7878/ghci-script
Prelude> :q …