diff --git a/ghc-old-time.spec b/ghc-old-time.spec
index 164ec17..e63e9e7 100644
--- a/ghc-old-time.spec
+++ b/ghc-old-time.spec
@@ -38,6 +38,7 @@ This package provides the Haskell %{pkg_name} library development files.
 
 %prep
 %setup -q -n %{pkg_name}-%{version}
+cabal-tweak-dep-ver base '< 4.9' '< 4.10'
 
 
 %build