diff --git a/ghc-rpm-macros.spec b/ghc-rpm-macros.spec
index a7c1e74..fcd24f4 100644
--- a/ghc-rpm-macros.spec
+++ b/ghc-rpm-macros.spec
@@ -10,7 +10,7 @@
 #%%global without_hscolour 1
 
 Name:           ghc-rpm-macros
-Version:        1.6.6
+Version:        1.6.7
 Release:        1%{?dist}
 Summary:        RPM macros for building packages for GHC
 
@@ -135,6 +135,9 @@ EOF
 
 
 %changelog
+* Thu Sep  1 2016 Jens Petersen <petersen@redhat.com> - 1.6.7-1
+- ghc_lib_subpackage now takes name-version processed with lua
+
 * Fri Aug 26 2016 Jens Petersen <petersen@redhat.com> - 1.6.6-1
 - ghc_gen_filelists: support packages with more than one license file
 - move licenses from docdir to licensedir instead of removing,
diff --git a/macros.ghc-extra b/macros.ghc-extra
index 4da5c4d..329a547 100644
--- a/macros.ghc-extra
+++ b/macros.ghc-extra
@@ -1,9 +1,16 @@
 # RPM Macros for packaging Haskell packages with multiple libs  -*-rpm-spec-*-
 
-# ghc_lib_subpackage [-c cdepslist] [-l licensetag] [-x] [name] [version]
+# ghc_lib_subpackage [-c cdepslist] [-l licensetag] [-x] [name-version]
 %ghc_lib_subpackage(c:l:x)\
-%define pkgname %{?1}%{!?1:%{pkg_name}}\
-%define pkgver %{?2}%{!?2:%{version}}\
+%define pkgname %{lua:\
+local pv = rpm.expand("%1")\
+local _, _, name = string.find(pv, "^([%a-]+)-")\
+print(name)\
+}\
+%define pkgver %{lua:\
+local pv = rpm.expand("%1")\
+print(string.sub(pv, string.find(pv, "[%d.]+$")))\
+}\
 %{!-x:%{?1:%global ghc_packages_list %{?ghc_packages_list} %{pkgname}-%{pkgver}}}\
 %define ghc_prefix %{?ghc_name}%{!?ghc_name:ghc}\
 %define basepkg %{ghc_prefix}-%{pkgname}\