Bug#1009925: haskell-devscripts: missing support for DEB_SETUP_GHC_CONFIGURE_ARGS

[Scott Talbert]

Package: haskell-devscripts
Version: 0.16.11
Severity: important

Dear Maintainer,

haskell-devscripts seems to have lost support for using the
DEB_SETUP_GHC_CONFIGURE_ARGS variable in debian/rules for adding arguments to
the GHC configure invocation.  The haskell-yaml package, for example, uses this for setting a build flag.

You can see in the recent reproducibility logs [1] that this package has
started to FTBFS because the flag isn't being provided and the package's
binaries are not being built.

[1] https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/haskell-yaml.html

Thanks,
Scott