diff --git a/ghc-pcre-light.spec b/ghc-pcre-light.spec
index 40a32b4..90325f1 100644
--- a/ghc-pcre-light.spec
+++ b/ghc-pcre-light.spec
@@ -13,20 +13,19 @@ semantics as Perl 5.
 
 Name:           ghc-%{pkg_name}
 Version:        0.4
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        %{common_summary}
 
 Group:          System Environment/Libraries
 License:        BSD
 URL:            http://hackage.haskell.org/package/%{pkg_name}
 Source0:        http://hackage.haskell.org/packages/archive/%{pkg_name}/%{version}/%{pkg_name}-%{version}.tar.gz
-# fedora ghc archs:
-ExclusiveArch:  %{ix86} x86_64 ppc alpha sparcv9 ppc64
+ExclusiveArch:  %{ghc_arches}
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  hscolour
-BuildRequires:  ghc-bytestring-prof
 %{?ghc_pkg_c_deps:BuildRequires:  %{ghc_pkg_c_deps}}
+BuildRequires:  ghc-bytestring-prof
 
 %description
 %{common_description}
@@ -48,6 +47,9 @@ BuildRequires:  ghc-bytestring-prof
 
 
 %changelog
+* Mon Jun 27 2011 Jens Petersen <petersen@redhat.com> - 0.4-4
+- use ghc_arches (cabal2spec-0.23.2)
+
 * Wed Jun 15 2011 Jens Petersen <petersen@redhat.com> - 0.4-3
 - update to cabal2spec-0.23