Bug#865089: haskell-pqueue FTBFS: dh: unable to load addon haskell: Can't locate Debian/Debhelper/Sequence/haskell.pm in @INC

[Adrian Bunk]

Source: haskell-pqueue
Version: 1.3.2.2-2
Severity: serious

https://buildd.debian.org/status/package.php?p=haskell-pqueue&suite=sid

...
 fakeroot debian/rules clean
dh clean --with haskell --buildsystem=haskell
dh: unable to load addon haskell: Can't locate Debian/Debhelper/Sequence/haskell.pm in @INC (you may need to install the Debian::Debhelper::Sequence::haskell module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.24.1 /usr/local/share/perl/5.24.1 /usr/lib/x86_64-linux-gnu/perl5/5.24 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.24 /usr/share/perl/5.24 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at (eval 12) line 2.
BEGIN failed--compilation aborted at (eval 12) line 2.

debian/rules:4: recipe for target 'clean' failed
make: *** [clean] Error 2