hs-pandoc-types 1.12.3 fails to build with current ghc

[J.Gilbey@…]

The build log says:

:info:build 
:info:build Text/Pandoc/Builder.hs:176:63:
:info:build     Can't make a derived instance of ‘Traversable Many’
:info:build       (even with cunning newtype deriving):
:info:build       You need DeriveTraversable to derive an instance for this class
:info:build     In the newtype declaration for ‘Many’
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_hs-pandoc-types/hs-pandoc-types/work/pandoc-types-1.12.3" && runhaskell Setup build -v 
:info:build Exit code: 1

This bug has been fixed upstream. Downloading ​http://hackage.haskell.org/package/pandoc-types-1.12.4.1/pandoc-types-1.12.4.1.tar.gz and applying the following patch to the Portfile solves half of it:

--- Portfile.orig	2015-01-08 13:17:46.000000000 +0000
+++ Portfile	2015-01-08 13:22:59.000000000 +0000
@@ -4,10 +4,9 @@
 PortSystem          1.0
 PortGroup           haskell 1.0
 
-haskell.setup       pandoc-types 1.12.3
-revision            3
-checksums           rmd160  04df3d7e32cd10cc060766ffe8bfcf0bea0d5bd8 \
-                    sha256  125825a795dc0cb2b6ffbe46789e60d62a42ba2eb0f07e544b5c39612fbd8ece
+haskell.setup       pandoc-types 1.12.4.1
+checksums           rmd160  e038c591b3c2e81bcd1485e29762be11a0f2513a \
+                    sha256  187bda4b12746b9cc460ae98b39d0964adace2bcca2fd0e343b1ea4234a86ff1
 
 maintainers         nomaintainer
 platforms           darwin
@@ -19,4 +18,5 @@
     used by pandoc to represent structured documents.
 
 depends_lib-append  port:hs-aeson \
-                    port:hs-syb
+                    port:hs-syb \
+                    port:hs-deepseq-generics

The only thing is that it requires deepseq-generics ​http://hackage.haskell.org/package/deepseq-generics-0.1.1.2/deepseq-generics-0.1.1.2.tar.gz, and a specific version of that (>=0.1 && <0.2), but I don't know how to specify that in the Portfile.

Attached is a Portfile for deepseq-generics which builds a package which allows hs-pandoc-types to build.

[J.Gilbey@…]

Portfile for hs-deepseq-generics

[neverpanic (Clemens Lang)]

Committed hs-deepseq-generics in r131304. Note that the license in the Portfile was wrong, the port is actually BSD, not GPL-2+.

[neverpanic (Clemens Lang)]

Committed hs-pandoc-types update in r131307.