diff --git a/README.md b/README.md
index f204b53..28be708 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 # ghc-blaze-builder
 
-This library provides an abstraction of buffered output of byte streams and several convenience functions to exploit it. For example, it allows to efficiently serialize Haskell values to lazy bytestrings with a large average chunk size. The large average chunk size allows to make good use of cache prefetching in later processing steps (e.g. compression) and reduces the sytem call overhead when writing the resulting lazy bytestring to a file or sending it over the network.
+This library provides an abstraction of buffered output of byte streams and several convenience functions to exploit it.
+For example, it allows to efficiently serialize Haskell values to lazy bytestrings with a large average chunk size.
+The large average chunk size allows to make good use of cache prefetching in later processing steps (e.g. compression) and reduces the sytem call overhead when writing the resulting lazy bytestring to a file or sending it over the network.
 
diff --git a/ghc-blaze-builder.spec b/ghc-blaze-builder.spec
index 868bd6c..3f3a6fd 100644
--- a/ghc-blaze-builder.spec
+++ b/ghc-blaze-builder.spec
@@ -1,58 +1,69 @@
 %define ghc_ver %(ghc --version | sed "s|.*version ||")
 %define pkgname %(echo %name | sed "s|^ghc-||")
+
 Name:          ghc-blaze-builder
-Version:       0.3.1.1
+Version:       0.3.3.4
 Release:       1mamba
-Summary:       An abstraction of buffered output of byte streams and several convenience functions to exploit it
+Epoch:         1
+Summary:       GHC library: Efficient buffered output
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://hackage.haskell.org/package/%{pkgname}
-Source:        http://hackage.haskell.org/packages/archive/blaze-builder/%{version}/blaze-builder-%{version}.tar.gz
+Source:        http://hackage.haskell.org/package/blaze-builder-%{version}/blaze-builder-%{version}.tar.gz
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
 BuildRequires: ghc
 BuildRequires: haskell-platform
+BuildRequires: ghc-bytestring-builder
 Requires:      ghc = %{ghc_ver}
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
-This library provides an abstraction of buffered output of byte streams and several convenience functions to exploit it. For example, it allows to efficiently serialize Haskell values to lazy bytestrings with a large average chunk size. The large average chunk size allows to make good use of cache prefetching in later processing steps (e.g. compression) and reduces the sytem call overhead when writing the resulting lazy bytestring to a file or sending it over the network.
+This library provides an abstraction of buffered output of byte streams and several convenience functions to exploit it.
+For example, it allows to efficiently serialize Haskell values to lazy bytestrings with a large average chunk size.
+The large average chunk size allows to make good use of cache prefetching in later processing steps (e.g. compression) and reduces the sytem call overhead when writing the resulting lazy bytestring to a file or sending it over the network.
 
 %prep
 %setup -q -n blaze-builder-%{version}
 
 %build
-runghc Setup.hs configure \
-   --prefix=%{_prefix} --libdir=%{_libdir}
+runghc Setup.hs configure -v3 \
+   --prefix=%{_prefix} \
+   --libdir=%{_libdir} \
+   --libexecdir=%{_libexecdir} \
+   --docdir=%{_docdir}/%{name}-%{version}
 
 runghc Setup.hs build
+runghc Setup.hs haddock --executables --html-location=URL --hyperlink-source
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 runghc Setup.hs copy --destdir=%{buildroot}
 runghc Setup.hs register \
---gen-pkg-config="%{buildroot}%{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/%{pkgname}-%{version}.conf"
+   --gen-pkg-config="%{buildroot}%{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/%{pkgname}-%{version}.conf"
 
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
 %post
-ghc-pkg register %{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/%{pkgname}-%{version}.conf &>/dev/null || true
-:
+ghc-pkg register %{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/%{pkgname}-%{version}.conf &>/dev/null || :
 
 %preun
-ghc-pkg unregister %{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/%{pkgname}-%{version}.conf &>/dev/null || true
-:
+ghc-pkg unregister %{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/%{pkgname}-%{version}.conf &>/dev/null || :
 
 %files
 %defattr(-,root,root)
-%dir %{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}
-%{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}/*
-%{_datadir}/doc/%{pkgname}-%{version}/LICENSE
+%{_libdir}/ghc-%{ghc_ver}/%{pkgname}-%{version}
+%dir %{_docdir}/%{name}-%{version}
+%{_docdir}/%{name}-%{version}/LICENSE
+%{_docdir}/%{name}-%{version}/html
 
 %changelog
+* Sun Apr 12 2015 Davide Madrisan <davide.madrisan@gmail.com> 0.3.3.4-1mamba
+- update to 0.3.3.4
+
 * Sun Sep 08 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 0.3.1.1-1mamba
 - package created by silvan using the webbuild interface