Haddock build issue with internal library?

[swt2c]

On Debian, we're having trouble building attoparsec 0.14.4 documentation (seems to be related to the internal library). Any ideas on what might be going wrong? It seems like Haddock shouldn't be trying to build documentation for internal libraries?

CC: @Bodigrim

Data/Attoparsec/Internal/Types.hs:43:1: error:
    Could not find module ‘Data.Attoparsec.ByteString.Buffer’
    There are files missing in the ‘attoparsec-0.14.4’ package,
    try running 'ghc-pkg check'.
    Use -v (or `:set -v` in ghci) to see a list of the files searched for.
   |
43 | import qualified Data.Attoparsec.ByteString.Buffer as B
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Data/Attoparsec/Internal/Types.hs:44:1: error:
    Could not find module ‘Data.Attoparsec.Text.Buffer’
    There are files missing in the ‘attoparsec-0.14.4’ package,
    try running 'ghc-pkg check'.
    Use -v (or `:set -v` in ghci) to see a list of the files searched for.
   |
44 | import qualified Data.Attoparsec.Text.Buffer as T
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Full build log here: https://buildd.debian.org/status/fetch.php?pkg=haskell-attoparsec&arch=amd64&ver=0.14.4-1&stamp=1655429416&raw=0

[Bodigrim]

@swt2c I cannot reproduce,

cabal unpack attoparsec-0.14.4
cd attoparsec-0.14.4
cabal-3.4.1.0 haddock -w ghc-9.0.2

succeeds on my machine (MacOS).

[swt2c]

OK. I will try to investigate further.

[swt2c]

It turns out that we needed to build the package first. After building, it works fine.