osc copypac from project:devel:languages:haskell:ghc-8.4.x package:ghc-split revision:7, using keep-link

OBS-URL: https://build.opensuse.org/package/show/devel:languages:haskell/ghc-split?expand=0&rev=42

ghc-split.spec

@@ -26,6 +26,7 @@ License:        BSD-3-Clause
 Group:          Development/Libraries/Haskell
 URL:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
+Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/1.cabal#/%{pkg_name}.cabal
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-rpm-macros
 %if %{with tests}
@@ -63,6 +64,7 @@ This package provides the Haskell %{pkg_name} library development files.
 
 %prep
 %setup -q -n %{pkg_name}-%{version}
+cp -p %{SOURCE1} %{pkg_name}.cabal
 
 %build
 %ghc_lib_build