diff --git a/ghc-SHA.spec b/ghc-SHA.spec
index 811c842..fb62871 100644
--- a/ghc-SHA.spec
+++ b/ghc-SHA.spec
@@ -1,21 +1,11 @@
 # https://fedoraproject.org/wiki/Packaging:Haskell
-# https://fedoraproject.org/wiki/PackagingDrafts/Haskell
 
 %global pkg_name SHA
 
-%global common_summary SHA message digest functions
-
-%global common_description This library implements the SHA suite of message digest functions,\
-according to NIST FIPS 180-2 (with the SHA-224 addendum), as well as\
-the SHA-based HMAC routines. The functions have been tested against\
-most of the NIST and RFC test vectors for the various functions.\
-While some attention has been paid to performance, these do not\
-presently reach the speed of well-tuned libraries, like OpenSSL.
-
 Name:           ghc-%{pkg_name}
 Version:        1.6.1
-Release:        1%{?dist}
-Summary:        %{common_summary}
+Release:        2%{?dist}
+Summary:        SHA message digest functions
 
 License:        BSD
 URL:            http://hackage.haskell.org/package/%{pkg_name}
@@ -31,7 +21,23 @@ BuildRequires:  ghc-directory-devel
 # End cabal-rpm deps
 
 %description
-%{common_description}
+This library implements the SHA suite of message digest functions,
+according to NIST FIPS 180-2 (with the SHA-224 addendum), as well as
+the SHA-based HMAC routines. The functions have been tested against
+most of the NIST and RFC test vectors for the various functions.
+While some attention has been paid to performance, these do not
+presently reach the speed of well-tuned libraries, like OpenSSL.
+
+
+%package devel
+Summary:        Haskell %{pkg_name} library development files
+Requires:       ghc-compiler = %{ghc_version}
+Requires(post): ghc-compiler = %{ghc_version}
+Requires(postun): ghc-compiler = %{ghc_version}
+Requires:       %{name} = %{version}-%{release}
+
+%description devel
+This package provides the Haskell %{pkg_name} library development files.
 
 
 %prep
@@ -46,18 +52,25 @@ BuildRequires:  ghc-directory-devel
 %ghc_lib_install
 
 
-%ghc_devel_package
-
-%ghc_devel_description
+%post devel
+%ghc_pkg_recache
 
 
-%ghc_devel_post_postun
+%postun devel
+%ghc_pkg_recache
 
 
-%ghc_files LICENSE
+%files -f %{name}.files
+%doc LICENSE
+
+
+%files devel -f %{name}-devel.files
 
 
 %changelog
+* Fri Jun 07 2013 Jens Petersen <petersen@redhat.com> - 1.6.1-2
+- update to new simplified Haskell Packaging Guidelines
+
 * Tue Mar 12 2013 Jens Petersen <petersen@redhat.com> - 1.6.1-1
 - update to 1.6.1