ghcup failed

Wed Jun 2 19:45:21 UTC 2021

On Wed, Jun 02, 2021 at 07:06:59PM +0000, Simon Peyton Jones via ghc-devs wrote:
> Dear devs
> I wanted to install GHC 8.10 on my WSL2 (Windows Subsystem for Linux) computer.
[...]
> ghc-pkg: Couldn't open database /home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/package.conf.d for modification: {handle: /home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/package.conf.d/package.cache.lock}: hLock: invalid argument (Invalid argument)

Turns out it was actually WSL1 and upgrading to WSL2 resolved the
problem.