diff --git a/ghc-snap-server.spec b/ghc-snap-server.spec
index 783a406..5c7bff0 100644
--- a/ghc-snap-server.spec
+++ b/ghc-snap-server.spec
@@ -98,8 +98,8 @@ This package provides the Haskell %{pkg_name} library development files.
 
 %prep
 %setup -q -n %{pkgver} -a1
-#cabal-tweak-dep-ver attoparsec '< 0.13' '< 0.14'
 cabal-tweak-drop-dep bytestring-builder
+cabal-tweak-dep-ver unix-compat '< 0.5' '< 0.6'
 
 
 %build