use subpkgs and ghc-rpm-macros-extra

ghc-data-default.spec

@@ -7,6 +7,7 @@
 %global instancescontainers data-default-instances-containers-0.0.1
 %global instancesdlist data-default-instances-dlist-0.0.1
 %global instancesoldlocale data-default-instances-old-locale-0.0.1
+%global subpkgs %{instancescontainers} %{instancesdlist} %{instancesoldlocale}
 
 Name:           ghc-%{pkg_name}
 Version:        0.7.1.1
@@ -21,7 +22,7 @@ Source2:        https://hackage.haskell.org/package/%{instancesdlist}/%{instance
 Source3:        https://hackage.haskell.org/package/%{instancesoldlocale}/%{instancesoldlocale}.tar.gz
 
 BuildRequires:  ghc-Cabal-devel
-BuildRequires:  ghc-rpm-macros
+BuildRequires:  ghc-rpm-macros-extra
 # Begin cabal-rpm deps:
 BuildRequires:  ghc-data-default-class-devel
 #BuildRequires:  ghc-data-default-instances-containers-devel
@@ -63,12 +64,12 @@ This package provides the Haskell %{pkg_name} library development files.
 
 
 %build
-%ghc_libs_build %{instancescontainers} %{instancesdlist} %{instancesoldlocale}
+%ghc_libs_build %{subpkgs}
 %ghc_lib_build
 
 
 %install
-%ghc_libs_install %{instancescontainers} %{instancesdlist} %{instancesoldlocale}
+%ghc_libs_install %{subpkgs}
 %ghc_lib_install