diff --git a/ghc-zip-archive.spec b/ghc-zip-archive.spec
index b256a66..c58a3d5 100644
--- a/ghc-zip-archive.spec
+++ b/ghc-zip-archive.spec
@@ -1,9 +1,10 @@
-%define ghc_ver %(ghc --version | sed "s|.*version ||")
-%define pkgname %(echo %name | sed "s|^ghc-||")
+%define ghc_ver %(/usr/bin/ghc --numeric-version)
+%define pkgname zip-archive
+
 Name:          ghc-zip-archive
-Version:       0.1.3.4
+Version:       0.2.3.7
 Release:       1mamba
-Summary:       Provides functions for creating, modifying, and extracting files from zip archives
+Summary:       GHC library and tools for creating and modifying zip archives
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
@@ -25,13 +26,17 @@ BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 The zip-archive library provides functions for creating, modifying, and extracting files from zip archives.
 
 %prep
-%setup -q -n zip-archive-%{version}
+%setup -q -n %{pkgname}-%{version}
 
 %build
-runghc Setup.lhs configure \
-   --prefix=%{_prefix} --libdir=%{_libdir}
+runghc Setup.lhs configure -v2 \
+   --prefix=%{_prefix} \
+   --libdir=%{_libdir} \
+   --libexecdir=%{_libexecdir} \
+   --docdir=%{_docdir}/%{name}-%{version}
 
 runghc Setup.lhs build
+runghc Setup.lhs haddock --executables --html-location=URL --hyperlink-source
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -43,19 +48,20 @@ runghc Setup.lhs register \
 [ "%{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}
+%{_datadir}/doc/%{name}-%{version}/LICENSE
+%{_datadir}/doc/%{name}-%{version}/html
 
 %changelog
+* Sun Apr 12 2015 Davide Madrisan <davide.madrisan@gmail.com> 0.2.3.7-1mamba
+- update to 0.2.3.7
+
 * Sun Sep 08 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 0.1.3.4-1mamba
 - package created by silvan using the webbuild interface