In Debian 10 and older, the libgdk-pixbuf2.0-dev package contains
development files for two libraries: gdk-pixbuf-2.0 and the deprecated
gdk-pixbuf-xlib-2.0.

In testing/unstable, it has been split into libgdk-pixbuf-2.0-dev
and libgdk-pixbuf-xlib-2.0-dev packages, in preparation for a new
upstream release of gdk-pixbuf-2.0 that moves gdk-pixbuf-xlib-2.0
into a separate source package. libgdk-pixbuf2.0-dev continues to
exist, but is now a transitional package that pulls in the deprecated
libgdk-pixbuf-xlib-2.0-dev in addition to libgdk-pixbuf-2.0-dev.

It looks as though haskell-gi-gdkpixbuf only requires the main
gdk-pixbuf-2.0 library. Please update the Depends and Build-Depends
so that it only pulls in that part, as in the attached patch.

The form suggested in the attached patch is backwards-compatible with
older Debian releases:

    libgdk-pixbuf-2.0-dev | libgdk-pixbuf2.0-dev

but if this package is unlikely to be backported, you can simplify that
to just the new package:

    libgdk-pixbuf-2.0-dev

Thanks,
    smcv

We believe that the bug you reported is fixed in the latest version of
haskell-gi-gdkpixbuf, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 976027@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Scott Talbert <swt@techie.net> (supplier of updated haskell-gi-gdkpixbuf package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 09 Jun 2022 21:41:40 -0400
Source: haskell-gi-gdkpixbuf
Architecture: source
Version: 2.0.28-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Haskell Group <pkg-haskell-maintainers@lists.alioth.debian.org>
Changed-By: Scott Talbert <swt@techie.net>
Closes: 976027 992229
Changes:
 haskell-gi-gdkpixbuf (2.0.28-1) unstable; urgency=medium
 .
   * Team upload.
   * Update to new upstream release 2.0.28 (Closes: #992229)
   * BD on libgdk-pixbuf-2.0-dev vice libgdk-pixbuf2.0-dev (Closes: #976027)
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