diff --git a/ghc.spec b/ghc.spec
index f93081b..92f4788 100644
--- a/ghc.spec
+++ b/ghc.spec
@@ -45,7 +45,7 @@ Version: 7.0.2
 # - release can only be reset if all library versions get bumped simultaneously
 #   (eg for a major release)
 # - minor release numbers should be incremented monotonically
-Release: 22%{?dist}
+Release: 23%{?dist}
 Summary: Glasgow Haskell Compilation system
 # fedora ghc has only been bootstrapped on the following archs:
 ExclusiveArch: %{ix86} x86_64 ppc alpha sparcv9 ppc64 
@@ -63,6 +63,13 @@ Obsoletes: ghc-doc < 6.12.3-4
 Provides: ghc-doc = %{version}-%{release}
 # introduced for f15
 Obsoletes: ghc-libs < 7.0.1-3
+Obsoletes: ghc-dph-base < 0.5, ghc-dph-base-devel < 0.5, ghc-dph-base-prof < 0.5
+Obsoletes: ghc-dph-par < 0.5, ghc-dph-par-devel < 0.5, ghc-dph-par-prof < 0.5
+Obsoletes: ghc-dph-prim-interface < 0.5, ghc-dph-prim-interface-devel < 0.5, ghc-dph-interface-prim-prof < 0.5
+Obsoletes: ghc-dph-prim-par < 0.5, ghc-dph-prim-par-devel < 0.5, ghc-dph-prim-par-prof < 0.5
+Obsoletes: ghc-dph-prim-seq < 0.5, ghc-dph-prim-seq-devel < 0.5, ghc-dph-prim-seq-prof < 0.5
+Obsoletes: ghc-dph-seq < 0.5, ghc-dph-seq-devel < 0.5, ghc-dph-seq-prof < 0.5
+Obsoletes: ghc-feldspar-language < 0.4, ghc-feldspar-language-devel < 0.4, ghc-feldspar-language-prof < 0.4
 BuildRequires: ghc, ghc-rpm-macros >= 0.13
 BuildRequires: gmp-devel, libffi-devel
 BuildRequires: ghc-directory-devel, ghc-process-devel, ghc-pretty-devel, ghc-containers-devel, ghc-haskell98-devel, ghc-bytestring-devel
@@ -385,6 +392,9 @@ fi
 %defattr(-,root,root,-)
 
 %changelog
+* Sat May 21 2011 Jens Petersen <petersen@redhat.com> - 7.0.2-23
+- obsolete dph libraries and feldspar-language
+
 * Mon May 16 2011 Jens Petersen <petersen@redhat.com> - 7.0.2-22
 - merge prof subpackages into the devel subpackages with ghc-rpm-macros-0.13