diff --git a/ghc-ekg-core.spec b/ghc-ekg-core.spec
index 87271f3..c5d3e11 100644
--- a/ghc-ekg-core.spec
+++ b/ghc-ekg-core.spec
@@ -47,6 +47,8 @@ This package provides the Haskell %{pkg_name} library development files.
 %prep
 %autosetup -n %{pkg_name}-%{version}
 cp -p %{SOURCE1} %{pkg_name}.cabal
+cabal-tweak-dep-ver base '< 4.15' '< 5'
+cabal-tweak-dep-ver ghc-prim '< 0.7' '< 1'
 
 %build
 %ghc_lib_build