[Pkg-haskell-maintainers] Bug#666368: hmake: FTBFS: Ambiguous interface for `Prelude'

[Lucas Nussbaum]

Source: hmake
Version: 3.14-3
Severity: serious
Tags: wheezy sid
User: debian-qa at lists.debian.org
Usertags: qa-ftbfs-20120330 qa-ftbfs qa-ftbfs-buildarch
Justification: FTBFS on amd64

Hi,

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

This rebuild was done by building only architecture:any binary packages
(binary-arch target of debian/rules), and using a recent dpkg that uses the
build-arch target if available.
Also, only the Build-Depends were installed, not the Build-Depends-Indep.

Relevant part:
> make[3]: Entering directory `/«PKGBUILDDIR»/src/hmake'
> mkdir -p /«PKGBUILDDIR»/targets/debian/obj/hmake || /bin/true
> mkdir -p /«PKGBUILDDIR»/targets/debian/obj/cpphs || /bin/true
> mkdir -p /«PKGBUILDDIR»/targets/debian/obj/cpphs/Text/ParserCombinators || /bin/true
> mkdir -p /«PKGBUILDDIR»/targets/debian/obj/cpphs/Language/Preprocessor/Cpphs || /bin/true
> ghc -i../cpphs    -package haskell98 -c -o /«PKGBUILDDIR»/targets/debian/obj/hmake/QSort.o QSort.hs
> 
> QSort.hs:20:8:
>     Ambiguous interface for `Prelude':
>       it was found in multiple packages: base haskell98-2.0.0.1
> make[3]: *** [/«PKGBUILDDIR»/targets/debian/obj/hmake/QSort.o] Error 1

The full build log is available from:
   http://people.debian.org/~lucas/logs/2012/03/30/hmake_3.14-3_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 about 50 AMD64 nodes
of the Grid'5000 platform, using a clean chroot.  Internet was not
accessible from the build systems.