local noindex repository cannot update on windows

[aavogt]

I installed cabal-3.6.2.0 on windows 11 with ghcup. I am using ghc-8.10.7

In C:\cabal\config I have two repositories that should contain the same packages:

repository localNoindex
  url: file+noindex:///cabal/localrepo/package

repository local
  url: file:///cabal/localrepo
  secure: True
  root-keys: 1f7fe92197eeb58a214d89b7e7ff1043cadddc5aa4fe185b3571ae8bab65cb14
     7ced667343b4bca5c5b36f9f1b24e3ac9d48344eda1f48f644d4bb4dd9cc2458
     8e9e98bab40e7a3e2ed33be2209ab3d7e85955d36c91ff9b615f8d4c1ebe433f

The directories look like:

$ ls /c/cabal/localrepo/package
hgeometry-0.13.tar.gz
$ tar xf hgeometry-0.13.tar.gz && ls hgeometry-0.13 # same as on hackage
LICENSE    Setup.hs   changelog      docs         hgeometry.cabal
README.md  benchmark  changelog.org  doctests.hs  src

localNoindex does not work:

$ cabal update localNoindex
Downloading the latest package list from localNoindex
cabal-3.6.2.0.exe: Error while updating index for localNoindex repository
dieVerbatim: user error (cabal-3.6.2.0.exe: Cannot read .cabal file inside
hgeometry-0.13.tar.gz
)

local works just fine but it needs extra steps to stay up-to-date (following https://hackage.haskell.org/package/hackage-repo-tool).

[Mikolaj]

I wonder if that's Windows-specific.