https://buildd.debian.org/status/package.php?p=haskell-topograph

...
hlibrary.setup: Encountered missing or private dependencies:
base >=4.6 && <4.15

 at /usr/share/perl5/Debian/Debhelper/Buildsystem/Haskell/Recipes.pm line 107.
	Debian::Debhelper::Buildsystem::Haskell::Recipes::run_quiet("debian/hlibrary.setup", "configure", "--ghc", "-v2", "--package-db=/var/lib/ghc/package.conf.d", "--prefix=/usr", "--libdir=/usr/lib/haskell-packages/ghc/lib", "--libexecdir=/usr/lib", ...) called at /usr/share/perl5/Debian/Debhelper/Buildsystem/Haskell/Recipes.pm line 131
	Debian::Debhelper::Buildsystem::Haskell::Recipes::run("debian/hlibrary.setup", "configure", "--ghc", "-v2", "--package-db=/var/lib/ghc/package.conf.d", "--prefix=/usr", "--libdir=/usr/lib/haskell-packages/ghc/lib", "--libexecdir=/usr/lib", ...) called at /usr/share/perl5/Debian/Debhelper/Buildsystem/Haskell/Recipes.pm line 620
	Debian::Debhelper::Buildsystem::Haskell::Recipes::configure_recipe() called at -e line 1
make: *** [/usr/share/cdbs/1/class/hlibrary.mk:153: build-ghc-stamp] Error 25

We believe that the bug you reported is fixed in the latest version of
haskell-topograph, 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 1014011@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Ilias Tsitsimpis <iliastsi@debian.org> (supplier of updated haskell-topograph 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: Mon, 18 Jul 2022 19:23:57 +0300
Source: haskell-topograph
Architecture: source
Version: 1.0.0.1-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Haskell Group <pkg-haskell-maintainers@lists.alioth.debian.org>
Changed-By: Ilias Tsitsimpis <iliastsi@debian.org>
Closes: 1014011
Changes:
 haskell-topograph (1.0.0.1-2) unstable; urgency=medium
 .
   * Declare compliance with Debian policy 4.6.1
   * Patch for newer dependencies (Closes: #1014011)
Checksums-Sha1:
 c6979ba1e92c10fa0e505cd5bce4a7bcaacb6cbd 2549 haskell-topograph_1.0.0.1-2.dsc
 2070b63df0c731d38584f4633e8c46d3f646d332 2772 haskell-topograph_1.0.0.1-2.debian.tar.xz
 40dedf15d6a97a2f396057f996834fe6438ac681 8810 haskell-topograph_1.0.0.1-2_amd64.buildinfo
Checksums-Sha256:
 651981849933adabb62394d868b69cd2548288381500c37b17ded2c1c1922539 2549 haskell-topograph_1.0.0.1-2.dsc
 aa0207e9e69bbeee12244b054ec501f7c92a5f9e0b0b2b759266169135a519c4 2772 haskell-topograph_1.0.0.1-2.debian.tar.xz
 299eb2cdc2d7afc520c00dab2f66087f3d6d4a0a6d7baa0e942377ed5935f1e8 8810 haskell-topograph_1.0.0.1-2_amd64.buildinfo
Files:
 852cd793c7445cbcdc427afb4f4e3024 2549 haskell optional haskell-topograph_1.0.0.1-2.dsc
 48dec04b96f627b5cf0454aebfcffce1 2772 haskell optional haskell-topograph_1.0.0.1-2.debian.tar.xz
 27b2139072c03f36a480c2e1d3da39f2 8810 haskell optional haskell-topograph_1.0.0.1-2_amd64.buildinfo
-----BEGIN PGP SIGNATURE-----
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=g4if
-----END PGP SIGNATURE-----