[Pkg-haskell-maintainers] Bug#725577: yi: FTBFS: The program alex version >=3.0.3 && <=3.0.5 is required but the version found at /usr/bin/alex is version 3.1.0

[David Suárez]

Source: yi
Version: 0.6.7.0-1
Severity: serious
Tags: jessie sid
User: debian-qa at lists.debian.org
Usertags: qa-ftbfs-20131006 qa-ftbfs
Justification: FTBFS on amd64

Hi,

During a rebuild of all packages in sid, your package failed to build on
amd64.

Relevant part (hopefully):
> unordered-containers-0.2.3.0
> Dependency utf8-string >=0.3.1: using utf8-string-0.3.7
> Dependency vty >=4.7.0.0 && <5: using vty-4.7.0.20
> Dependency xdg-basedir >=0.2.1 && <0.3: using xdg-basedir-0.2.2
> Dependency yi -any: using yi-0.6.7.0
> hlibrary.setup: The program alex version >=3.0.3 && <=3.0.5 is required but
> the version found at /usr/bin/alex is version 3.1.0
> make: *** [dist-ghc] Error 1

The full build log is available from:
   http://aws-logs.debian.net/ftbfs-logs/2013/10/06/yi_0.6.7.0-1_unstable.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.