[Pkg-haskell-maintainers] Bug#783985: ghc: FTBFS on arm64

[Edmund Grimley Evans]

Source: ghc
Version: 7.8.4-3

It failed to build on arm64:

http://buildd.debian.org/status/package.php?p=ghc&suite=sid

The error was:

Registering ghc-prim-0.3.1.0...
"inplace/bin/ghc-cabal" register libraries/integer-gmp dist-install "/«PKGBUILDDIR»/debian/tmp/usr/lib/ghc/bin/ghc" "/«PKGBUILDDIR»/debian/tmp/usr/lib/ghc/bin/ghc-pkg" "/«PKGBUILDDIR»/debian/tmp/usr/lib/ghc" '/«PKGBUILDDIR»/debian/tmp' '/usr' '/usr/lib/ghc' '/usr/share/doc/ghc-doc/html/libraries' NO  
Warning: cannot determine version of
/«PKGBUILDDIR»/debian/tmp/usr/lib/ghc/bin/ghc-pkg :
""
ghc-cabal: Installed package ID not registered: "ghc-prim-0.3.1.0-inplace"

Something similar was reported upstream, and apparently fixed there on Apr 20/21:

https://ghc.haskell.org/trac/ghc/ticket/9673

Can that fix be ported to Debian, or are the branches too different?