Bug#1099748: ghc: Installation warning about missing include directory for directory-1.3.8.5

[Tomáš Szaniszlo]

Package: ghc
Version: 9.6.6-4
Severity: minor

Dear maintainer,

I would like to let you know that during an upgrade of ghc ((9.6.6-4) over (9.6.6-3)) I got this warning:

    Setting up ghc (9.6.6-4) ...
    update-alternatives: using /usr/bin/runghc to provide /usr/bin/runhaskell (runhaskell) in auto mode
    update-alternatives: using /usr/bin/ghc to provide /usr/bin/haskell-compiler (haskell-compiler) in auto mode
    Warning: include-dirs: /usr/lib/ghc/lib/../lib/x86_64-linux-ghc-9.6.6/directory-1.3.8.5/include doesn't exist or isn't a directory

However, this package does not seem to be completely broken:

    $ ghci
    ghci> :module + System.Directory
    ghci> doesPathExist "/"
    True

Best wishes
Tomaxuser

-- System Information:
Debian Release: trixie/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.12.12-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages ghc depends on:
ii  dpkg            1.22.15
ii  gcc             4:14.2.0-1
ii  libbsd-dev      0.12.2-2
ii  libc6           2.40-7
ii  libc6-dev       2.40-7
ii  libffi-dev      3.4.7-1
ii  libffi8         3.4.7-1
ii  libgmp-dev      2:6.3.0+dfsg-3
ii  libgmp10        2:6.3.0+dfsg-3
ii  libncurses-dev  6.5+20250216-1
ii  libnuma-dev     2.0.18-1+b1
ii  libnuma1        2.0.18-1+b1
ii  libtinfo6       6.5+20250216-1

Versions of packages ghc recommends:
ii  libstdc++-14-dev  14.2.0-17

Versions of packages ghc suggests:
pn  ghc-doc   <none>
pn  ghc-prof  <none>
pn  llvm-18   <none>
ii  perl      5.40.1-2

-- no debconf information