Failed to update cabal-install on a fresh Arch Linux installation

Created by: zhangkaizhao

On a fresh Arch Linux installation, I'm following the instruction in README:

# install the last known "best" GHC version
ghcup install
# install a specific GHC version
ghcup install 8.2.2
# set the currently "active" GHC version
ghcup set 8.4.4
# install cabal-install
ghcup install-cabal
# update cabal-install
cabal new-install cabal-install

And there is an error raised while processing the last command line task:

$ cabal new-install cabal-install
cabal: ghc-pkg dump failed: dieVerbatim: user error (cabal:
'/home/kaizhao/.ghcup/bin/ghc-pkg' exited with an error:
ghc-pkg: /home/kaizhao/.cabal/store/ghc-8.4.4/package.db:
getDirectoryContents:openDirStream: does not exist (No such file or directory)
)

$

The error insists after running the cabal new-update command to download the latest package list. Tree of directories and files in ~/.cabal:

$ tree .cabal/
.cabal/
├── bin
├── config
└── packages
    └── hackage.haskell.org
        ├── 01-index.cache
        ├── 01-index.tar
        ├── 01-index.tar.gz
        ├── 01-index.tar.idx
        ├── 01-index.timestamp
        ├── hackage-security-lock
        ├── mirrors.json
        ├── root.json
        ├── snapshot.json
        └── timestamp.json

3 directories, 11 files